Data Communication and Computer Networks - Functions of OSI and TCP/IP Layers
- Option : D
- Explanation : Statement S1
The Distance Vector routing protocols rely on the information from their directly connected neighbours in order to calculate and accumulate route information. Distance Vector routing protocols require very little overhead as compared to Link State routing protocols as measured by memory and processor power while the Link State routing protocols do not rely solely on the information from the neighbours or adjacent router in order to calculate route information. I nstead, Link State routing protocols have a system of databases that they use in order to calculate the best route to destinations in the network. This is TRUE
Statement S3
Distance Vector exchanges the routing updates periodically whether the topology is change or not, this will maximize the convergence time which increases the chance of routing loops while the Link State routing protocols send triggered change based updates when there is a topology change. After initial flood, pass small event based triggered link state updates to all other routers. This will minimize the convergence time that’s why there is no chance of routing loops. This is TRUE.
- Option : C
- Explanation : Assume the source S & destination D are
connected through two intermediate routers
labled R. Determine how many times each packet
has to visit the network layer and data link layer
during a transmission from S to D.
Network Layer 4 times
Data link layer 6 times
- Option : A
- Explanation : We know that RIP uses distance vector routing and QSPF uses link state routing.
- Option : C
- Explanation :
Since, the router R1 contains TCP part numbers of Q and R2 contains the TCP part numbers of H at Data link layer, and with both routers contains IP addresses of Q and H at Network layer. So, only statement I2 and I3 will be true.
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