MAC

Question 1
Which of the following is a MAC address?
A
192.166.200.50
B
00056A:01A01A5CCA7FF60
C
568, Airport Road
D
01:A5:BB:A7:FF:60
       Computer-Networks       MAC       ISRO CS 2009
Question 1 Explanation: 
A media access control address (MAC address) of a device is a unique identifier assigned to a network interface controller (NIC).
MAC addresses are recognizable as six groups of two hexadecimal digits, separated by hyphens, colons, or no separator.
Option (A) is example for IP address
Option (B) and (C ) are not examples for any address representation in computer
01:A5:BB:A7:FF:60 is the MAC address which consists of six groups of two hexadecimal digits, separated by hyphens, colons, or no separator.
Question 2
The network protocol which is used to get MAC address of a node by providing IP address is
A
SMTP
B
ARP
C
RIP
D
BOOTP
       Computer-Networks       MAC       ISRO CS 2011
Question 2 Explanation: 
Address Resolution Protocol(ARP) is used to find the MAC address of a device using its IP address.
Reverse Address Resolution Protocol(RARP) is the viceversa case of ARP as it is a protocol by which a physical machine in a local area network can request to learn its IP address from a gateway server.
There are 2 questions to complete.
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