The IP protocol corresponds to layer ______ of the OSI reference model .

The IP protocol corresponds to layer ______ of the OSI reference model .
A . 5
B . 3
C . 2
D . 1

Answer: B

Explanation:

Application layer protocol: see T13

Transport layer protocol: TCP (6) UDP (17)

Network layer protocols: IP , ICMP ( ICMP messages can be divided into ICMP error messages and ICMP query messages), IGMP (Internet Group Management Protocol, responsible for managing multicast groups)

Network interface layer protocols: Ethernet, Token Ring, HDLC , PPP , X.25 , Frame Relay, PSTN , ISDN, etc.