In IM, ________ servers allow two users to locate each other.
A) index
B) relay
C) presence
D) All of the above

Question

Quizplus · Accepted Answer

Presence servers allow users to locate each other in instant messaging by indicating whether a user is online, offline or away. Index servers are used for storing and retrieving content, and relay servers are used to maintain connectivity between users. However, neither index nor relay servers specifically allow users to locate each other.

In IM, ________ Servers Allow Two Users to Locate Each