Basic CS-Networks [3i Infotech Placement]: Sample Questions 62 - 63 of 90

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Question 62

Networks
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Write in Short

Short Answer▾

What is passive topology?

Explanation

Understanding of Linear Bus
  • When the computers on the network simply listen and receive the signal, they are referred to as passive because they don՚t amplify the signal in any way.
  • Example for passive topology - linear bus.
  • Linear bus topology consists of a main run of cable with a terminator at each end.
  • All nodes are connected to the linear cable.
  • Ethernet and local talk network use a linear bus topology.

Question 63

Networks
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Describe in Detail

Essay▾

What are some of the routing protocols typically is use in a network.

Explanation

RIP:

  • Routing Information Protocol used on small or medium sized internal networks
  • Connected to the early Internet.
  • Capable of routing messages across networks up to a maximum of 15 hops.
  • Enabled routers to discover network by first sending a message requesting router tables from neighbouring devices.
  • Neighbour routers running RIP respond by sending the full routing tables back to the requestor the requestor follows an algorithm to merge all of these updates into its own table.

OSPF:

  • Open Shortest Path First was created to overcome limitations of RIP
    • The 15 hop count restriction
    • The inability to organize networks into a routing hierarchy, important for manageability and performance on large internal networks
    • The significant network traffic generated by repeatedly re-sending full router tables at scheduled intervals.
  • OSPF is an open public standard with widespread across many industry vendors.
  • It is the only link state routing protocol listed in this category.

EIGRP and IGRP:

  • Cisco developed Internet Gateway Routing Protocol as another alternative to RIP.
  • The newer Enhanced IGRP made.
  • EIGRP supports classless IP subnets and improves the efficiency of the routing algorithms compared to older IGRP.
  • It does not support routing hierarchies, like RIP.
  • Created as a proprietary protocol runnable only on Cisco family devices.
  • EIGRP was designed with the goals of easier configuration and better performance than OSPF.

IS-IS:

  • Functions of The Intermediate System to Intermediate System protocol similarly to OSPF.
  • Remains in widespread use by service providers who benefitted from the protocol being more easily adaptable to their special environments.
  • Not run over Internet Protocol (IP) and uses its own addressing scheme.

BGP and EGP:

  • The Border Gateway Protocol is the Internet standard External Gateway Protocol.
  • Detects modifications to routing tables and selectively communicates those changes to other routers over TCP/IP.
  • Internet providers commonly use BGP to join their networks together.
  • Larger business use BGP to join together multiple of their internal networks.

Developed by: