Question

Q1) Describe the way multiple devices in a local network share a single

global IP. How do the destination device identify the host? How do

router know the source to forward a message that it receives from a

server?

q2) Describe the advantages and disadvantages of dynamic routing over static routing

Answer 1

Answer :- 1) Network Address Translation (NAT) method is to make a single IP address used by several local devices. It is a method of remapping the IP address space into another by modifying network address in IP header. This is done in the routing device.
A look-up table is maintained in the router. This look up table is used to identify the host and a source in the local server.

Answer :- 2) The advantages and disadvantages of the static routing are-

Advantages :-

1. CPU processing is less.
2. Easy to configure the system
3. Easy to understand for administator

Disadvantages :-

1. Time consuming in terms of configuration
2. More chances of error as network size increases
3. More complex as network size grows

The advantages and disadvantages of the dynamic routing are-

Advantages :-

1. Less work for administrator to configure
2. Protocol automatically sets as per the topology of the network
3. Less chances of error
4. Can be used for large network

Disadvantages :-

1. Updates are shared between the routers, hence more bandwidth is required
2. Additional load on CPU and RAM
3. The choice of best route is done by router and not by Admin.