CS610 Current Finalterm Paper Spring 2014 Shared By Afzal

1) Network administrator wants to assign three IP address on different hosts in a network, each address start with bit 0.write the class to which these IP address belongs?
Answer:
B class.

2) Which multicast protocol is design to use within organization?
Answer:
 PROTOCOL INDEPENDENT MULTICAST _ DENSE MODE (PIM-DM).
3) Which types of NAT devices are available?
Answer:
DSL, IP
7) How IP multicast group becomes anonymous?
IP multicast group is anonymous in two ways:
Answer:
1. Neither a sender nor a receiver knows the identity or the number of group members.
2. Routers and hosts do not know which applications will send a datagram to a group.

8) Which layer of TCP/IP ensures reliable transformation?
Answer
Transport layer.

Characteristics of EGP (5)

BORDER GATEWAY PROTOCOL:
It is most popular Exterior Gateway Protocol in Internet. It has following characteristics:
"It provides routing among autonomous systems (EGP).
"It provides policies to control routes advertised.
"It uses reliable transport (TCP).
"It gives path of autonomous systems for each destination.
"Currently the EGP is of choice in the Internet.
"The current version is four (BGP-4).
"It provides facilities for Transit Routing.

Characteristics ROUTING INFORMATION PROTOCOL (RIP):
It has the following characteristics:
"It is used for routing within an autonomous system (IGP).
"Hop Count Metric: RIP measures distance in network hops, where each network between the source and destination counts as a single hop.
"It uses UDP for all message transmissions.
"RIP is used over LAN. Version 1 of RIP uses hardware broadcast and version 2 allows delivery via multicast.
"It can be used to advertise default route propagation. An organization can use RIP to install a default route in each router.
"It uses distance vector algorithm.
"RIP allows hosts to listen passively and update its routing table

4) If an ARP received how to deal with it write the process (5)
Answer:
When an ARP message arrives, the protocol specifies that the receiver must perform two basic steps.
First the receiver extracts the sender’s addresses binding and checks to see if
It is present in the cache. If not, it updates the cache.
The receiver examines the operation field of the message to determine whether the message is a request or a response. If the message is a request, the receiver compares the field TARGET PADDR with the local protocol address. If the two are identical, the computer is the target of the request and must send an ARP response.
5)      130.4.102.1/22 write the subnet mask for that (3)
Answer:
 255.255.252.0

13)  Two drawbacks of ARP (3)
Answer:

spoofing

sniffing

17) Why multiple router used.
Answer:
To connect multiple networks we use multiple routers.

19)  Which protocol provide universal service?
Answer:
TCP/IP

22) If an error is detected and reported, does the network layer provides mechanism for error correction? (3)
Answer:
No, network layer does not provide.

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