Deck 7: Network Layer and Packet Switching

Question 1

If there are N routers from source to destination, the total end to end delay in sending packet P(L-> number of bits in the packet R-> transmission rate) is equal to

A)n
B)(n*l)/r
C)(2n*l)/r
D)l/r

Answer 1

(n*l)/r

Question 2

What are the Methods to move data through a network of links and switches?

A)packet switching and line switching
B)circuit switching and line switching
C)line switching and bit switching
D)packet switching and circuit switching

Answer 2

packet switching and circuit switching

Question 3

The required resources for communication between end systems are reserved for the duration of the session between end systems in-----------method.

A)packet switching
B)circuit switching
C)line switching
D)frequency switching

Answer 3

circuit switching

Question 4

As the resources are reserved between two communicating end systems in circuit switching,----------- is achieved.

A)authentication
B)guaranteed constant rate
C)reliability
D)store and forward

Question 5

In----------------  systems, resources are allocated on demand.

A)packet switching
B)circuit switching
C)line switching
D)frequency switching

Question 6

Which of the following is not an application layer service?

A)network virtual terminal
B)file transfer, access, and management
C)mail service
D)error control

Question 7

Which of the following is not applicable for IP?

A)error reporting
B)handle addressing conventions
C)datagram format
D)packet handling conventions

Question 8

Which of the following field in IPv4 datagram is not related to fragmentation?

A)flags
B)offset
C)tos
D)identifier

Question 9

The TTL field has value 10. How many routers (max) can process this datagram?

A)11
B)5
C)10
D)1

Question 10

If the value in protocol field is 17, the transport layer protocol used is

A)tcp
B)udp
C)icmp
D)igmp

Question 11

The data field cannot carry which of the following?

A)tcp segment
B)udp segment
C)icmp messages
D)smtp messages

Question 12

What should be the flag value to indicate the last fragment?

A)0
B)1
C)ttl value
D)protocol field value

Question 13

Which of these is not applicable for IP protocol?

A)is connectionless
B)offer reliable service
C)offer unreliable service
D)does not offer error reporting

Question 14

Which of the following demerits does Fragmentation have?

A)complicates routers
B)open to dos attack
C)overlapping of fragments.
D)all of the mentioned

Question 15

Which field helps to check rearrangement of the fragments?

A)offset
B)flag
C)ttl
D)identifer

Question 16

A 4 byte IP address consists of

A)only network address
B)only host address
C)network address & host address
D)network address & mac address

Question 17

Consider a situation in which you are a system administrator on a NetWare network, you are running NetWare 4.11 and you cannot communicate with your router. What is the likely problem?

A)netware 4.11 defaults to 802.2 encapsulation
B)netware 4.11 defaults to 802.3 encapsulation
C)cisco routers only work with netware 3.11
D)netware 3.11 defaults to 802.2 encapsulation

Question 18

NetWare IPX addressing uses a network number and a node number. Which statement is not true?

A)the network address is administratively assigned and can be up to 16 hexadecimal digits long
B)the node address is always administratively assigned
C)the node address is usually the mac address
D)if the mac address is used as the node address, then ipx eliminates the use of arp