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Token Ring LANs FAQ



Frequently Asked Questions about token ring networking and networks.

This FAQ about token ring networking and networks. was compiled and written by James Messer James@NetworkUptime.com with numerous contributions by others.

-1.1] What is this FAQ? (comp.dcom.lans.token-ring)
This FAQ will attempt to explain and decipher the intricacies ...
-1.5] Can I use this FAQ on my web page? (comp.dcom.lans.token-ring)
Since this FAQ changes almost daily, a copy of the FAQ on your ...
-2.1] What is token ring?
Token ring is the IEEE 802.5 standard that connects ...
-2.2] How do Ethernet and token ring networks compare?
Token Ring is single access, meaning there is only one token. Thus,...
-2.3] Where are the IEEE specifications? (Introduction to Token Ring)
The IEEE specifications can be purchased from the IEEE at:...
-3.1] How does token ring work?
A token ring network uses a special frame called a token ...
-3.2] What is used to convert between Ethernet and Token Ring?
There is no 'converter' that allows an Ethernet network and ...
-4.1] What physical devices are required for a token ring network?
Token ring connectivity requires three separate physical entities; ...
-4.2] What types of cables are used for token ring?
There are three major physical token ring cabling systems; ...
-4.3] What pin assignments are used in token ring cabling?
An IBM-type Data Connector or Universal Data Connector (IDC or UDC),...
-4.4] What is the difference between a MAU, a CAU, and a LAM? (Token Ring Physical Layer)
A MAU is a 8228 Multistation Access Unit. This unit provides ...
-4.5] Can two token ring stations be directly attached?
Unlike Ethernet stations, token ring stations _cannot_ be ...
-4.6] What is the maximum distance between a MAU and a token ring station, or between two token ring stations?
In token ring networking, distance requirements are different ...
-4.7] What is the formula for computing adjusted ring length (ARL)? (Token Ring Physical Layer)
The adjusted ring length of a token ring network is the sum of ...
-4.8] Why is ring length important? (Token Ring Physical Layer)
The design of any network is dependent on limits. In token ...
-4.9] At what speeds does token ring run?
Token ring runs at speeds of 4 megabits per second (500,000 ...
-4.10] How many stations are supported by a single token ring network?
Again, this number is dependent on the token ring equipment that ...
-4.11] What is High Speed Token Ring?
High Speed Token Ring, or HSTR, is a new token ring standard ...
-5.1] What is a token? (Token Ring Data Link Layer)
A token frame is a three byte frame that takes this format:...
-5.2] What are MAC frames? (Token Ring Data Link Layer)
A Media Access Control (MAC) frame is used for management of ...
-5.3] What are LLC frames? (Token Ring Data Link Layer)
A Logical Link Control (LLC) frame is used to transfer data ...
-5.4] What are Locally Administered Addresses (LAAs)? (Token Ring Data Link Layer)
Token ring addresses are either locally administered or ...
-5.5] What are functional addresses? (Token Ring Data Link Layer)
Functional addresses are assigned by the token ring specification ...
-5.6] What is an Active Monitor and Standby Monitor? (Token Ring Data Link Layer)
Devices are either active monitors or standby monitors. There ...
-5.7] What is early token release? (Token Ring Data Link Layer)
In normal token ring operation, a station sending information ...
-5.8] What is transparent bridging? (Token Ring Data Link Layer)
Transparent bridging is a method to connect two similar ...
-5.9] What is the spanning tree protocol? (Token Ring Data Link Layer)
Spanning tree is a protocol defined in IEEE 802.1q to ...
-5.10] What is source route bridging? (Token Ring Data Link Layer)
Source route bridging is a method to connect two similar ...
-5.11] What is token ring switching? (Token Ring Data Link Layer)
From a functional point of view switching is exactly the same ...
-5.12] What is the process for inserting into a ring? (Token Ring Data Link Layer)
This information is derived from the TMS380 Second-Generation ...
-5.13] How do you troubleshoot the insertion process? (Token Ring Data Link Layer)
Phase 0: Media Lobe Check ...
-6.1] What are isolating and non-isolating errors? (Token Ring Errors and Troubleshooting)
An isolating error can be attributable to a specific station on ...
-6.2] What is the claim process? (Token Ring Errors and Troubleshooting)
This is when a the ring elects a new Active Monitor. It is ...
-6.3] What is a beacon frame? (Token Ring Errors and Troubleshooting)
A beacon frame is sent generated by a station or stations that ...
-6.4] What is promiscuous mode? (Token Ring Errors and Troubleshooting)
Promiscuous mode is used with protocol analysis or ...
-6.5] What non-commercial software is available to monitor a token ring network?
A list of commercial, shareware, and freeware software is ...
-7.1] What token ring books are available?
The Certified Network Expert (CNX) consortium described in section [7.2] has an excellent list of token-ring books. This list ...
-7.2] What certifications are available regarding token ring networks?
A token ring-specific certification is available through ...
-7.3] What companies make token ring adapter cards and MAUs?









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