Which network-layer protocol is responsible for addressing hosts?

A.
SPX

B.
TCP

C.
IP

D.
HTTP

Explanation:
IP is a network layer protocol (Layer 3). It is responsible for addressing hosts and routing.
Incorrect Answers:
A: SPX (Sequenced Packet exchange Protocol) is a transport layer protocol (Layer 4).
B: TCP is a transport layer protocol (Layer 4).
D: HTTP is an application, and runs at the application layer (layer 7) level.