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Q. 1. Different topologies behave differently when a connection fails. You are required to discuss the effect on the network when only one device connection fails in the following cases..
1.  Seven devices are connected through a ring topology.
2.  Six devices are connected through a dual ring topology.
3.  Four devices are connected through a mesh topology.
4.  Twelve devices are connected through a star topology (Note: Do not consider the hub failure).
5.  Fifteen devices are connected through a star topology and only the hub is failed.
6.  Eight devices are connected through a bus topology.

Note: Your answer for Q.1 should be in the same order as given in the question statements.

Q. 2. Suppose a small company wants to develop a computer network of 18 computers in its main office. Due to limited resources the company wants a network architecture where a single communication medium can be shared among all other nodes. Considering this scenario, you are required to suggest the suitable line configuration and name all the possible ways through which your suggested line configuration can be implemented..

Note:

o   Assignment should be in your own wordings not copied from Internet, handouts or books.

o   Your answer should be “to the point”.
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Brief, ordered guidance that complements ’s suggestion to draw diagrams and acknowledges ’s point about homework and ’s background links. The items below follow the original question order and flag assumptions to state when writing the answer (for example: does “one device connection fails” mean the device’s NIC, its drop cable, or a break in the backbone?).

  1. Ring (7 devices)
    A single broken link or failed node in a simple single-ring prevents the token from circulating and typically brings the whole ring down. Exception: ring hardware with automatic bypass/auto-wrap can isolate the failed node and keep the rest alive.

  2. Dual ring (6 devices)
    A dual (redundant) ring tolerates one link/node failure by switching traffic to the partner ring; connectivity is preserved though redundancy/capacity is reduced until repair.

  3. Mesh (4 devices)
    In a full mesh a single link failure rarely partitions the network because alternate paths exist between endpoints; only multiple simultaneous failures or loss of a hub node in a partial mesh will cause partitions.

  4. Star (12 devices; hub/switch OK)
    A single device cable/port failure isolates only that device. Other stations remain unaffected if the central device is healthy.

  5. Star (15 devices; hub failed)
    Central-device failure is a single point of failure: the whole LAN becomes unusable until the hub/switch is replaced or bypassed.

  6. Bus (8 devices)
    If only a node’s drop/NIC fails and the backbone stays intact, only that node is lost. If the backbone or terminator is damaged/removed, the entire bus will fail or split into segments.

Q2 (18 PCs, single shared medium)
Suggested line configuration: bus (single shared medium). Common implementations to list: coaxial bus (historical 10BASE‑5/10BASE‑2 with terminators), hub-based shared Ethernet (single collision domain), wireless single-channel (shared radio medium), and industrial multi‑drop buses (RS‑485/CAN). Note the practical caveat: a pure bus scales poorly (collisions, fault sensitivity); for production use a switched-star design is usually preferable.

Practical notes to include in the assignment: explicitly state assumptions, draw a simple diagram for each case, and mention basic diagnostics (link LEDs, swap cable/port, ping/traceroute, check terminators or bypass mechanisms).

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Member Avatar for caperjack

Assignment should be in your own wordings not copied from Internet, handouts or books

sorry we don't do homework ,good luck

Edited by caperjack
Member Avatar for rubberman

Start by drawing diagrams of the interconnection topologies in each case, 1-6. Then answer the question relevant to each topology.

As Caperjack said - we don't do your homework. We will help you, IF you make an honest effort to solve it yourself.

Member Avatar for anilak

This forum is to help you when you really facing some issue. But not for homeworks. Following links can give you information about topology types. Gothrough them write answers your own.

http://www.slideshare.net/narechania/ppt-of-types-ofnetwork#btnNext
http://compnetworking.about.com/od/networkdesign/a/topologies.htm
http://revisesmart.co.uk/computing/networking/bus-ring-star-network-topologies.html

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