DSSB_2017

Question

Default subnet mask for a class?

1.255.255.255.0

2.255.0.0.0

3.255.255..0.0

4.All of the above.

Please explain if you are answering. Thanku

Answer 1

Answer is 4

You should click on this link for explenation  

http://www.tcpipguide.com/free/t_IPDefaultSubnetMasksForAddressClassesABandC.htm

Answer 2

all of the above, Class A , CLASS B , CLASS C

Comments

for class A 255.0.0.0

 class B 255.255.0.0

 class C 255.255.255.0

Answer 3

answer is 4 because

1.255.255.255.0:CLASS C

2.255.0.0.0:CLASS A

3.255.255..0.0:CLASS B

SO ALL THREE OF THEM ARE DEFAULT SUBNET MASK