Re: full-duplex Ethernet cable? [7:31643]
or BERT Test Allen May wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... Yep...and PIN Number, ACL List, etc. I used to bug instructors by referring to them as Network Interface Card Card's to point out what NIC Card really was ;) Allen - Original Message - From: Patrick Ramsey To: Sent: Friday, January 11, 2002 11:54 AM Subject: RE: full-duplex Ethernet cable? [7:31643] Is NIC Card kinda like a FAT Table? : p Daniel Cotts 01/11/02 12:34PM Unshielded Twisted Pair (UTP) uses two pair (four wires) on pins 12 and 36 of an RJ-45 plug. Whether it runs as full or half duplex is determined by the connected equipment - NIC card, Hub, Switch, router, etc. If Ethernet is running over coax cable then it is limited to half duplex. -Original Message- From: mlh [mailto:[EMAIL PROTECTED]] Sent: Friday, January 11, 2002 10:56 AM To: [EMAIL PROTECTED] Subject: full-duplex Ethernet cable? [7:31643] Hi, there, how many pairs of two-twisted cable are used for full-duplex Ethernet ? what is the difference between full- and half- duplex cable? Thank you in advance. Regrads, mlh Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=31728t=31643 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: full-duplex Ethernet cable? [7:31643]
By the way, the old timers used to say NIC Center. (Network Information Center Center) Priscilla At 10:54 AM 1/12/02, Jeff Buehler wrote: or BERT Test Allen May wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... Yep...and PIN Number, ACL List, etc. I used to bug instructors by referring to them as Network Interface Card Card's to point out what NIC Card really was ;) Allen - Original Message - From: Patrick Ramsey To: Sent: Friday, January 11, 2002 11:54 AM Subject: RE: full-duplex Ethernet cable? [7:31643] Is NIC Card kinda like a FAT Table? : p Daniel Cotts 01/11/02 12:34PM Unshielded Twisted Pair (UTP) uses two pair (four wires) on pins 12 and 36 of an RJ-45 plug. Whether it runs as full or half duplex is determined by the connected equipment - NIC card, Hub, Switch, router, etc. If Ethernet is running over coax cable then it is limited to half duplex. -Original Message- From: mlh [mailto:[EMAIL PROTECTED]] Sent: Friday, January 11, 2002 10:56 AM To: [EMAIL PROTECTED] Subject: full-duplex Ethernet cable? [7:31643] Hi, there, how many pairs of two-twisted cable are used for full-duplex Ethernet ? what is the difference between full- and half- duplex cable? Thank you in advance. Regrads, mlh Priscilla Oppenheimer http://www.priscilla.com Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=31736t=31643 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
full-duplex Ethernet cable? [7:31643]
Hi, there, how many pairs of two-twisted cable are used for full-duplex Ethernet ? what is the difference between full- and half- duplex cable? Thank you in advance. Regrads, mlh Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=31643t=31643 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: full-duplex Ethernet cable? [7:31643]
AFAIK, Ethernet would need 1,2 for transmit and 3,6 for receive (and CSMA\CD if half-duplex). Cable dosen't make a station full or half-duplex, it's the hardware. -- RFC 1149 Compliant. FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: full-duplex Ethernet cable? [7:31643]
Hi mlh, Depends on the speed. 10/100mbps full/half duplex uses two pair of the four pairs in a CAT 5 cable. 1000mbps full/half duplex uses all four pair of a CAT 5 cable. Follow the link for the explanation of full and half duplex. http://www.webopedia.com/TERM/f/full_duplex.html Theoretically in full duplex mode each machine can send and receive on a separate pair thus doubling your bandwidth. For example, 100mbps in full duplex mode could send 100mbps on one pair and receive 100mbps on the other pair at the same time which equals 200mbps. This would mean both devices are sending 100mbps. Full duplex would be a point-to-point connection and nothing in between the two devices. In half duplex mode only one machine can send at anytime. I don't know if I covered it all, please correct me if I am wrong. HTH, Scott -Original Message- From: mlh [mailto:[EMAIL PROTECTED]] Sent: Friday, January 11, 2002 8:56 AM To: [EMAIL PROTECTED] Subject: full-duplex Ethernet cable? [7:31643] Hi, there, how many pairs of two-twisted cable are used for full-duplex Ethernet ? what is the difference between full- and half- duplex cable? Thank you in advance. Regrads, mlh Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=31646t=31643 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: full-duplex Ethernet cable? [7:31643]
Unshielded Twisted Pair (UTP) uses two pair (four wires) on pins 12 and 36 of an RJ-45 plug. Whether it runs as full or half duplex is determined by the connected equipment - NIC card, Hub, Switch, router, etc. If Ethernet is running over coax cable then it is limited to half duplex. -Original Message- From: mlh [mailto:[EMAIL PROTECTED]] Sent: Friday, January 11, 2002 10:56 AM To: [EMAIL PROTECTED] Subject: full-duplex Ethernet cable? [7:31643] Hi, there, how many pairs of two-twisted cable are used for full-duplex Ethernet ? what is the difference between full- and half- duplex cable? Thank you in advance. Regrads, mlh Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=31649t=31643 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: full-duplex Ethernet cable? [7:31643]
short answer, no differance Dave mlh wrote: Hi, there, how many pairs of two-twisted cable are used for full-duplex Ethernet ? what is the difference between full- and half- duplex cable? Thank you in advance. Regrads, mlh -- David Madland Sr. Network Engineer CCIE# 2016 Qwest Communications Int. Inc. [EMAIL PROTECTED] 612-664-3367 Emotion should reflect reason not guide it Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=31653t=31643 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: full-duplex Ethernet cable? [7:31643]
Is NIC Card kinda like a FAT Table? : p Daniel Cotts 01/11/02 12:34PM Unshielded Twisted Pair (UTP) uses two pair (four wires) on pins 12 and 36 of an RJ-45 plug. Whether it runs as full or half duplex is determined by the connected equipment - NIC card, Hub, Switch, router, etc. If Ethernet is running over coax cable then it is limited to half duplex. -Original Message- From: mlh [mailto:[EMAIL PROTECTED]] Sent: Friday, January 11, 2002 10:56 AM To: [EMAIL PROTECTED] Subject: full-duplex Ethernet cable? [7:31643] Hi, there, how many pairs of two-twisted cable are used for full-duplex Ethernet ? what is the difference between full- and half- duplex cable? Thank you in advance. Regrads, mlh Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=31654t=31643 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: full-duplex Ethernet cable? [7:31643]
At 11:56 AM 1/11/02, mlh wrote: how many pairs of two-twisted cable are used for full-duplex Ethernet ? what is the difference between full- and half- duplex cable? 10Base-T and 100Base-T unshielded twisted-pair cabling uses two pairs, for both full duplex and half duplex. There's a transmit pair and a receive pair. A station's transmit pair gets crossed over at the hub or switch to mean receive at the hub or switch. The hub or switch's transmit pair becomes receive at the station. It's not the cabling that distinguishes half-duplex and full-duplex. It's the logical topology, hardware, and configuration. With half-duplex, if a station receives bits on its receive pair while transmitting bits on its transmit pair, this is considered a collision. The station must stop transmitting, back off, and retransmit. A half-duplex network is shared. Every device on the hub (or coax cable) shares the bandwidth and must obey the rules of Carrier Sense Multiple Access, Collision Detect. Listen before sending. Listen while sending to see if another station started sending at the same time and back off if that's the case. Full duplex works on a point-to-point link between a station and a switch. Bandwidth is not shared. In this case, receiving while you are sending it perfectly legitimate. So, to upgrade a network from half-duplex to full-duplex doesn't require new cabling, but it does require a new logical topology and possibly new hardware: switches and Network Interface Cards (NICs) that support full duplex. It also requires that the administrator configure everything for full duplex (or use auto-negotiation which is risky because it's buggy.) Hope that helps. Priscilla Thank you in advance. Regrads, mlh Priscilla Oppenheimer http://www.priscilla.com Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=31655t=31643 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: full-duplex Ethernet cable? [7:31643]
Yep...and PIN Number, ACL List, etc. I used to bug instructors by referring to them as Network Interface Card Card's to point out what NIC Card really was ;) Allen - Original Message - From: Patrick Ramsey To: Sent: Friday, January 11, 2002 11:54 AM Subject: RE: full-duplex Ethernet cable? [7:31643] Is NIC Card kinda like a FAT Table? : p Daniel Cotts 01/11/02 12:34PM Unshielded Twisted Pair (UTP) uses two pair (four wires) on pins 12 and 36 of an RJ-45 plug. Whether it runs as full or half duplex is determined by the connected equipment - NIC card, Hub, Switch, router, etc. If Ethernet is running over coax cable then it is limited to half duplex. -Original Message- From: mlh [mailto:[EMAIL PROTECTED]] Sent: Friday, January 11, 2002 10:56 AM To: [EMAIL PROTECTED] Subject: full-duplex Ethernet cable? [7:31643] Hi, there, how many pairs of two-twisted cable are used for full-duplex Ethernet ? what is the difference between full- and half- duplex cable? Thank you in advance. Regrads, mlh Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=31657t=31643 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: full-duplex Ethernet cable? [7:31643]
I don't know why it irritates me so much...it's really crazy but I can't stand hearing people say NIC Card NIC...NICjust say it!...grin... Allen May 01/11/02 01:36PM Yep...and PIN Number, ACL List, etc. I used to bug instructors by referring to them as Network Interface Card Card's to point out what NIC Card really was ;) Allen - Original Message - From: Patrick Ramsey To: Sent: Friday, January 11, 2002 11:54 AM Subject: RE: full-duplex Ethernet cable? [7:31643] Is NIC Card kinda like a FAT Table? : p Daniel Cotts 01/11/02 12:34PM Unshielded Twisted Pair (UTP) uses two pair (four wires) on pins 12 and 36 of an RJ-45 plug. Whether it runs as full or half duplex is determined by the connected equipment - NIC card, Hub, Switch, router, etc. If Ethernet is running over coax cable then it is limited to half duplex. -Original Message- From: mlh [mailto:[EMAIL PROTECTED]] Sent: Friday, January 11, 2002 10:56 AM To: [EMAIL PROTECTED] Subject: full-duplex Ethernet cable? [7:31643] Hi, there, how many pairs of two-twisted cable are used for full-duplex Ethernet ? what is the difference between full- and half- duplex cable? Thank you in advance. Regrads, mlh Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=31659t=31643 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: full-duplex Ethernet cable? [7:31643]
NIC lol Scott -Original Message- From: Patrick Ramsey [mailto:[EMAIL PROTECTED]] Sent: Friday, January 11, 2002 10:59 AM To: [EMAIL PROTECTED] Subject: Re: full-duplex Ethernet cable? [7:31643] I don't know why it irritates me so much...it's really crazy but I can't stand hearing people say NIC Card NIC...NICjust say it!...grin... Allen May 01/11/02 01:36PM Yep...and PIN Number, ACL List, etc. I used to bug instructors by referring to them as Network Interface Card Card's to point out what NIC Card really was ;) Allen - Original Message - From: Patrick Ramsey To: Sent: Friday, January 11, 2002 11:54 AM Subject: RE: full-duplex Ethernet cable? [7:31643] Is NIC Card kinda like a FAT Table? : p Daniel Cotts 01/11/02 12:34PM Unshielded Twisted Pair (UTP) uses two pair (four wires) on pins 12 and 36 of an RJ-45 plug. Whether it runs as full or half duplex is determined by the connected equipment - NIC card, Hub, Switch, router, etc. If Ethernet is running over coax cable then it is limited to half duplex. -Original Message- From: mlh [mailto:[EMAIL PROTECTED]] Sent: Friday, January 11, 2002 10:56 AM To: [EMAIL PROTECTED] Subject: full-duplex Ethernet cable? [7:31643] Hi, there, how many pairs of two-twisted cable are used for full-duplex Ethernet ? what is the difference between full- and half- duplex cable? Thank you in advance. Regrads, mlh Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=31661t=31643 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: full-duplex Ethernet cable? [7:31643]
How about ATM machine? Or local LEC? VIN number? Patrick Ramsey 1/11/02 11:58:52 AM I don't know why it irritates me so much...it's really crazy but I can't stand hearing people say NIC Card NIC...NICjust say it!...grin... Allen May 01/11/02 01:36PM Yep...and PIN Number, ACL List, etc. I used to bug instructors by referring to them as Network Interface Card Card's to point out what NIC Card really was ;) Allen - Original Message - From: Patrick Ramsey To: Sent: Friday, January 11, 2002 11:54 AM Subject: RE: full-duplex Ethernet cable? [7:31643] Is NIC Card kinda like a FAT Table? : p Daniel Cotts 01/11/02 12:34PM Unshielded Twisted Pair (UTP) uses two pair (four wires) on pins 12 and 36 of an RJ-45 plug. Whether it runs as full or half duplex is determined by the connected equipment - NIC card, Hub, Switch, router, etc. If Ethernet is running over coax cable then it is limited to half duplex. -Original Message- From: mlh [mailto:[EMAIL PROTECTED]] Sent: Friday, January 11, 2002 10:56 AM To: [EMAIL PROTECTED] Subject: full-duplex Ethernet cable? [7:31643] Hi, there, how many pairs of two-twisted cable are used for full-duplex Ethernet ? what is the difference between full- and half- duplex cable? Thank you in advance. Regrads, mlh Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=31663t=31643 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: full-duplex Ethernet cable? [7:31643]
I can see you are a stable person -Original Message- From: Patrick Ramsey [mailto:[EMAIL PROTECTED]] Sent: Friday, January 11, 2002 1:59 PM To: [EMAIL PROTECTED] Subject: Re: full-duplex Ethernet cable? [7:31643] I don't know why it irritates me so much...it's really crazy but I can't stand hearing people say NIC Card NIC...NICjust say it!...grin... Allen May 01/11/02 01:36PM Yep...and PIN Number, ACL List, etc. I used to bug instructors by referring to them as Network Interface Card Card's to point out what NIC Card really was ;) Allen - Original Message - From: Patrick Ramsey To: Sent: Friday, January 11, 2002 11:54 AM Subject: RE: full-duplex Ethernet cable? [7:31643] Is NIC Card kinda like a FAT Table? : p Daniel Cotts 01/11/02 12:34PM Unshielded Twisted Pair (UTP) uses two pair (four wires) on pins 12 and 36 of an RJ-45 plug. Whether it runs as full or half duplex is determined by the connected equipment - NIC card, Hub, Switch, router, etc. If Ethernet is running over coax cable then it is limited to half duplex. -Original Message- From: mlh [mailto:[EMAIL PROTECTED]] Sent: Friday, January 11, 2002 10:56 AM To: [EMAIL PROTECTED] Subject: full-duplex Ethernet cable? [7:31643] Hi, there, how many pairs of two-twisted cable are used for full-duplex Ethernet ? what is the difference between full- and half- duplex cable? Thank you in advance. Regrads, mlh Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=31664t=31643 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: full-duplex Ethernet cable? [7:31643]
We are the Knights who sayNIC! oh manI really need to get back to work. :-) Scott Nawalaniec 1/11/02 12:13:40 PM NIC lol Scott -Original Message- From: Patrick Ramsey [mailto:[EMAIL PROTECTED]] Sent: Friday, January 11, 2002 10:59 AM To: [EMAIL PROTECTED] Subject: Re: full-duplex Ethernet cable? [7:31643] I don't know why it irritates me so much...it's really crazy but I can't stand hearing people say NIC Card NIC...NICjust say it!...grin... Allen May 01/11/02 01:36PM Yep...and PIN Number, ACL List, etc. I used to bug instructors by referring to them as Network Interface Card Card's to point out what NIC Card really was ;) Allen - Original Message - From: Patrick Ramsey To: Sent: Friday, January 11, 2002 11:54 AM Subject: RE: full-duplex Ethernet cable? [7:31643] Is NIC Card kinda like a FAT Table? : p Daniel Cotts 01/11/02 12:34PM Unshielded Twisted Pair (UTP) uses two pair (four wires) on pins 12 and 36 of an RJ-45 plug. Whether it runs as full or half duplex is determined by the connected equipment - NIC card, Hub, Switch, router, etc. If Ethernet is running over coax cable then it is limited to half duplex. -Original Message- From: mlh [mailto:[EMAIL PROTECTED]] Sent: Friday, January 11, 2002 10:56 AM To: [EMAIL PROTECTED] Subject: full-duplex Ethernet cable? [7:31643] Hi, there, how many pairs of two-twisted cable are used for full-duplex Ethernet ? what is the difference between full- and half- duplex cable? Thank you in advance. Regrads, mlh Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=31665t=31643 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: full-duplex Ethernet cable? [7:31643]
I did not note a speed associated with that full-duplex Ethernet spec. Wouldn't GigE Cu require all eight? And, might a new cable plant effort be well-served to require all eight conductors per RJ? Best, G. VP OGC -Original Message- From: Allen May [mailto:[EMAIL PROTECTED]] Sent: Friday, January 11, 2002 10:40 AM To: [EMAIL PROTECTED] Subject: Re: full-duplex Ethernet cable? [7:31643] Yep...and PIN Number, ACL List, etc. I used to bug instructors by referring to them as Network Interface Card Card's to point out what NIC Card really was ;) Allen - Original Message - From: Patrick Ramsey To: Sent: Friday, January 11, 2002 11:54 AM Subject: RE: full-duplex Ethernet cable? [7:31643] Is NIC Card kinda like a FAT Table? : p Daniel Cotts 01/11/02 12:34PM Unshielded Twisted Pair (UTP) uses two pair (four wires) on pins 12 and 36 of an RJ-45 plug. Whether it runs as full or half duplex is determined by the connected equipment - NIC card, Hub, Switch, router, etc. If Ethernet is running over coax cable then it is limited to half duplex. -Original Message- From: mlh [mailto:[EMAIL PROTECTED]] Sent: Friday, January 11, 2002 10:56 AM To: [EMAIL PROTECTED] Subject: full-duplex Ethernet cable? [7:31643] Hi, there, how many pairs of two-twisted cable are used for full-duplex Ethernet ? what is the difference between full- and half- duplex cable? Thank you in advance. Regrads, mlh Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=31667t=31643 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: full-duplex Ethernet cable? [7:31643]
me and a buddy came up with close to 20 one extremely boring night! I'm not sure which is worse...being the one who says it or being obsessed with telling people to stop saying it! ha -Patrick John Neiberger 01/11/02 02:27PM How about ATM machine? Or local LEC? VIN number? Patrick Ramsey 1/11/02 11:58:52 AM I don't know why it irritates me so much...it's really crazy but I can't stand hearing people say NIC Card NIC...NICjust say it!...grin... Allen May 01/11/02 01:36PM Yep...and PIN Number, ACL List, etc. I used to bug instructors by referring to them as Network Interface Card Card's to point out what NIC Card really was ;) Allen - Original Message - From: Patrick Ramsey To: Sent: Friday, January 11, 2002 11:54 AM Subject: RE: full-duplex Ethernet cable? [7:31643] Is NIC Card kinda like a FAT Table? : p Daniel Cotts 01/11/02 12:34PM Unshielded Twisted Pair (UTP) uses two pair (four wires) on pins 12 and 36 of an RJ-45 plug. Whether it runs as full or half duplex is determined by the connected equipment - NIC card, Hub, Switch, router, etc. If Ethernet is running over coax cable then it is limited to half duplex. -Original Message- From: mlh [mailto:[EMAIL PROTECTED]] Sent: Friday, January 11, 2002 10:56 AM To: [EMAIL PROTECTED] Subject: full-duplex Ethernet cable? [7:31643] Hi, there, how many pairs of two-twisted cable are used for full-duplex Ethernet ? what is the difference between full- and half- duplex cable? Thank you in advance. Regrads, mlh Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=31670t=31643 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: full-duplex Ethernet cable? [7:31643]
It is true that 10Base-T and 100Base-T unshielded twisted-pair cabling uses two pairs, both full duplex and half duplex. It is true that It's not the cabling that distinguishes half-duplex and full-duplex. It's the logical topology, hardware, and configuration. But, if you want to run 100Base-T and full-duplex depend you must take care on the cable4s length and quality. It functions better if you have CAT-5 or CAT-5E cable. - Original Message - From: Priscilla Oppenheimer To: Sent: Friday, January 11, 2002 9:59 AM Subject: Re: full-duplex Ethernet cable? [7:31643] At 11:56 AM 1/11/02, mlh wrote: how many pairs of two-twisted cable are used for full-duplex Ethernet ? what is the difference between full- and half- duplex cable? 10Base-T and 100Base-T unshielded twisted-pair cabling uses two pairs, for both full duplex and half duplex. There's a transmit pair and a receive pair. A station's transmit pair gets crossed over at the hub or switch to mean receive at the hub or switch. The hub or switch's transmit pair becomes receive at the station. It's not the cabling that distinguishes half-duplex and full-duplex. It's the logical topology, hardware, and configuration. With half-duplex, if a station receives bits on its receive pair while transmitting bits on its transmit pair, this is considered a collision. The station must stop transmitting, back off, and retransmit. A half-duplex network is shared. Every device on the hub (or coax cable) shares the bandwidth and must obey the rules of Carrier Sense Multiple Access, Collision Detect. Listen before sending. Listen while sending to see if another station started sending at the same time and back off if that's the case. Full duplex works on a point-to-point link between a station and a switch. Bandwidth is not shared. In this case, receiving while you are sending it perfectly legitimate. So, to upgrade a network from half-duplex to full-duplex doesn't require new cabling, but it does require a new logical topology and possibly new hardware: switches and Network Interface Cards (NICs) that support full duplex. It also requires that the administrator configure everything for full duplex (or use auto-negotiation which is risky because it's buggy.) Hope that helps. Priscilla Thank you in advance. Regrads, mlh Priscilla Oppenheimer http://www.priscilla.com Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=31676t=31643 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: full-duplex Ethernet cable? [7:31643]
John Neiberger raved, We are the Knights who sayNIC! oh manI really need to get back to work. :-) No, John. You need a shrubbery. Scott Nawalaniec 1/11/02 12:13:40 PM NIC lol Scott -Original Message- From: Patrick Ramsey [mailto:[EMAIL PROTECTED]] Sent: Friday, January 11, 2002 10:59 AM To: [EMAIL PROTECTED] Subject: Re: full-duplex Ethernet cable? [7:31643] I don't know why it irritates me so much...it's really crazy but I can't stand hearing people say NIC Card NIC...NICjust say it!...grin... Allen May 01/11/02 01:36PM Yep...and PIN Number, ACL List, etc. I used to bug instructors by referring to them as Network Interface Card Card's to point out what NIC Card really was ;) Allen - Original Message - From: Patrick Ramsey To: Sent: Friday, January 11, 2002 11:54 AM Subject: RE: full-duplex Ethernet cable? [7:31643] Is NIC Card kinda like a FAT Table? : p Daniel Cotts 01/11/02 12:34PM Unshielded Twisted Pair (UTP) uses two pair (four wires) on pins 12 and 36 of an RJ-45 plug. Whether it runs as full or half duplex is determined by the connected equipment - NIC card, Hub, Switch, router, etc. If Ethernet is running over coax cable then it is limited to half duplex. -Original Message- From: mlh [mailto:[EMAIL PROTECTED]] Sent: Friday, January 11, 2002 10:56 AM To: [EMAIL PROTECTED] Subject: full-duplex Ethernet cable? [7:31643] Hi, there, how many pairs of two-twisted cable are used for full-duplex Ethernet ? what is the difference between full- and half- duplex cable? Thank you in advance. Regrads, mlh Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=31681t=31643 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: full-duplex Ethernet cable? [7:31643]
At 03:20 PM 1/11/02, Joseba Izaga wrote: It is true that 10Base-T and 100Base-T unshielded twisted-pair cabling uses two pairs, both full duplex and half duplex. It is true that It's not the cabling that distinguishes half-duplex and full-duplex. It's the logical topology, hardware, and configuration. But, if you want to run 100Base-T and full-duplex depend you must take care on the cable4s length and quality. It functions better if you have CAT-5 or CAT-5E cable. That statement applies if you want to run 100Base-T with half duplex also. In fact, 100Base-TX requires Cat 5 or better. I just checked the standard. 10Base-T, on the other hand, does not say that. He asked about cabling requirements for half versus full. He didn't ask about cabling requirements for 10 Mbps versus 100 Mbps. Priscilla - Original Message - From: Priscilla Oppenheimer To: Sent: Friday, January 11, 2002 9:59 AM Subject: Re: full-duplex Ethernet cable? [7:31643] At 11:56 AM 1/11/02, mlh wrote: how many pairs of two-twisted cable are used for full-duplex Ethernet ? what is the difference between full- and half- duplex cable? 10Base-T and 100Base-T unshielded twisted-pair cabling uses two pairs, for both full duplex and half duplex. There's a transmit pair and a receive pair. A station's transmit pair gets crossed over at the hub or switch to mean receive at the hub or switch. The hub or switch's transmit pair becomes receive at the station. It's not the cabling that distinguishes half-duplex and full-duplex. It's the logical topology, hardware, and configuration. With half-duplex, if a station receives bits on its receive pair while transmitting bits on its transmit pair, this is considered a collision. The station must stop transmitting, back off, and retransmit. A half-duplex network is shared. Every device on the hub (or coax cable) shares the bandwidth and must obey the rules of Carrier Sense Multiple Access, Collision Detect. Listen before sending. Listen while sending to see if another station started sending at the same time and back off if that's the case. Full duplex works on a point-to-point link between a station and a switch. Bandwidth is not shared. In this case, receiving while you are sending it perfectly legitimate. So, to upgrade a network from half-duplex to full-duplex doesn't require new cabling, but it does require a new logical topology and possibly new hardware: switches and Network Interface Cards (NICs) that support full duplex. It also requires that the administrator configure everything for full duplex (or use auto-negotiation which is risky because it's buggy.) Hope that helps. Priscilla Thank you in advance. Regrads, mlh Priscilla Oppenheimer http://www.priscilla.com Priscilla Oppenheimer http://www.priscilla.com Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=31683t=31643 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
RE: full-duplex Ethernet cable? [7:31643]
Yes, or TCP/IP Protocol for that matter. -Original Message- From: Patrick Ramsey [mailto:[EMAIL PROTECTED]] Sent: Friday, January 11, 2002 11:54 AM To: [EMAIL PROTECTED] Subject: RE: full-duplex Ethernet cable? [7:31643] Is NIC Card kinda like a FAT Table? : p Daniel Cotts 01/11/02 12:34PM Unshielded Twisted Pair (UTP) uses two pair (four wires) on pins 12 and 36 of an RJ-45 plug. Whether it runs as full or half duplex is determined by the connected equipment - NIC card, Hub, Switch, router, etc. If Ethernet is running over coax cable then it is limited to half duplex. -Original Message- From: mlh [mailto:[EMAIL PROTECTED]] Sent: Friday, January 11, 2002 10:56 AM To: [EMAIL PROTECTED] Subject: full-duplex Ethernet cable? [7:31643] Hi, there, how many pairs of two-twisted cable are used for full-duplex Ethernet ? what is the difference between full- and half- duplex cable? Thank you in advance. Regrads, mlh Message Posted at: http://www.groupstudy.com/form/read.php?f=7i=31682t=31643 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
