Sample

Which of the following functionalities must be implemented by a transport protocol over and above the network protocol ?

• Recovery from packet losses
• Detection of duplicate packets
• Packet delivery in the correct order
• End to end connectivity

The address resolution protocol (ARP) is used for:

• Finding the IP address from the DNS
• Finding the IP address of the default gateway
• Finding the IP address that corresponds to a MAC address
• Finding the MAC address that corresponds to an IP address

For which one of the following reasons does Internet Protocol (IP) use the timeto- live (TTL) field in the IP datagram header

• Ensure packets reach destination within that time
• Discard packets that reach later than that time
• Prevent packets from looping indefinitely
• Limit the time for which a packet gets queued in intermediate routers.

If a class B network on the Internet has a subnet mask of 255.255.248.0, what is the maximum number of hosts per subnet?

• 1022
• 1023
• 2047
• 2046

In version field of IPv4 header, when machine is using some other version of IPv4 then datagram is

• Accepted
• Interpreted
• Interpreted incorrectly
• Discarded

Network layer at source is responsible for creating a packet from data coming from another __________

• Link
• Node
• Station
• Protocol

Header of datagram in IPv4 has __________.

• 0 to 20 bytes
• 20 to 40 bytes
• 20 to 80 bytes
• 20 to 60 bytes

In IPv4, service type of service in header field, first 3 bits are called __________.

• Type of service
• Code bits
• Sync bits
• Precedence bits

In IPv4, only thing encapsulated in a frame is _____.

• Unit
• Adresses
• Data Frame
• Datagram

In IPv4, fragmented datagram's fragment size should have first byte number divisible by _________.

• 2
• 4
• 16
• 8