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In a token bus network architecture, the nodes at either end of the bus do not actually meet. In a token ring, the network logically functions as a ring, but is wired as a star.
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How is the operation of 802.4token bus?
A token bus uses a shared bus for communication. Hosts on the bus are ordered in a logical ring, with access to the bus coordinated by passing a token (a special packet) around the ring, indicating permission to transmit. The intent is to get the robustness of a simple bus protocol with the deterministic response time of a token ring. Unfortunately, because the bus is shared, each host on the bus must wait for the token to be completely transmitted before it can pass it on. This is in contrast to a token ring, where the token passes through each host with only a few bits delay. This gives the token bus considerably worse latency than a token ring. The reliability of a token protocol over a (CSMA protocl such as Ethernet ) is undermined by the complex protocols needed to recover the token at exactly one host should it become corrupted.
What is the difference between ring topology and bus topology?
Basically, in a Bus topology, any station connected to the network can speak at any time. In a ring topology, the stations must wait to be issued the "token" before they can speak. Ethernet (Bus topology) uses CSMA/CD (Carrier-Sense Multiple Access/Collision Detection) to determine when two or more stations speak at the same time. In Ring topologies such as Token Ring and FDDI, this isn't an issue since the passing of the "token" guarantees that no two stations will speak at the same time.
Discuss the difficulties that one encounters when trying to build a bridge between the various Ethernet Token Ring and Token Bus LANs.?
Since there is no protocol known as Ethernet Token Ring I assume you are asking about the difference between Ethernet, Token Ring, and Token Bus usage. These are all different protocols, so connecting all three types of networks is not practical. Token Bus networks were an early attempt to get mainframes to connect to terminals through a bus topology structure, utilizing a token for arbitration. Those networks typically ran at 4 Mbps. They were also subject to the same problem as a linear bus structure with Ethernet, which is a break in the cable would bring down the entire network. A later version of Token ring uses a ring topology structure, where a failure in the network will not bring down the entire network. It still uses a token for station arbitration, but can ran at 16 Mbps. Newer versions of HSTR can run at 100 Mbps and there is a standard for a gigabit version. Chances are you will need to bridge between Ethernet and Token Ring (not token bus). For that, you will need a bridge, router, or gateway that can convert between the protocols. In some cases the media is different as well, going from coaxial cable to unshielded twisted pair (UTP). So the difficulties are in correctly converting the protocols between the two, connecting different media types together, and troubleshooting problems between the two networks.
What is token bus?
A token bus is a type of network which uses the token ring protocol. The protocol is implemented over a virtual ring using coaxial cable. A token is passed around the ring, so that only one computer has the right to transmit data. If the chosen computer doesn't have any data to transmit, the token is passed to the next computer.
In token bus network what happens when the station accepts atoken and crashes immediately?
How does Token Bus (IEEE 802.4) enforce discipline on a logical ring topology? ----
Difference between token ring and Ethernet bus?
Token bus is as far as I know the theory that token ring's transmission is based on. Both physical layers of networking, can be said that they were two competing set of networking technology, both initial members of IEEE 802.x networking family. Token ring is based on passing packets along a track from one station to another like a passenger in a train, for fail-safe redundancy there were 2 duplicate tracks can be thought as one clockwise one counter-clockwise in a ringed/circular arrangement. Ethernet is rather about shooting packets from source to destination. If there is another packet being shot a collision is this, the packets are lost and shooters agree to re-shoot at a random time hopefully and likely so avoid the collision again, but if it happens again do it again and again...
Why do you suppose that Ethernet won out over Token Bus?
Because Ethernet is so much faster than a token ring network.
What is the difference between a bus and a coach?
Its the seats that make the difference between a coach and a bus.
What is the functional difference between Token Ring Token Bus and FDDI?
There are no purely functional differences between a token ring token bus implementation and FDDI. In fact, the token bus is defined in IEEE 802.4, and FDDI's topology derives from that very standard. Think of FDDI as being a subset of 802.4. Refer to RFC 1042 (http://www.faqs.org/rfcs/rfc1042.html) for more details.The remainder of my entry doesn't really apply to this question and is more subjective, but I do try to outline some other non-functional differences between the two standards.Apart from functional differences, the obvious ones can be broken into a couple different parts off the top of my head: physical and application. The physical difference is that Token Ring pretty much uses coax cable as its medium while FDDI conspicuously uses fiber. From an application standpoint, Token Ring is short distance (coax has a maximum attenuation distance of 500 meters) while FDDI can traverse far greater distances while attaining greater throughput. As a result, FDDI would be much more scalable, supportive of many more users, and primarily used in large geographically-demanding environments but pricey; on the other hand, token ring would be for less scalable environments but cheaper.Another non-functional difference would be noise immunizations. FDDI is inherently immune to most interferences that coax implementations would be heir to. Fluorescent lighting, various frequencies, and other causes of noise to fiber would not affect it in the same adverse manner that would apply to coax.
What is a sentence for the word token?
You can't get on the bus without a token.
What is the difference between a cold and a bus driver?
The difference between a cold and a bus driver is a bus driver has a course to run and a cold has to run its course.
What is the difference between a master bus and a slave bus?
none
