IP Protocol Types

Question 1

What is Transmission Control Protocol (TCP)?

Answer 1

A communications standard that enables application programs and computing devices to exchange messages over a network.

Question 2

What is User Datagram Protocol (UDP)?

Answer 2

A communications protocol for time-sensitive applications like gaming, playing videos, or Domain Name System (DNS) lookups.

Question 2

What is Internet Control Message Protocol (ICMP)?

Answer 2

Used to communicate information about network connectivity issues back to the sender.

Question 3

What is Generic Routing Encapsulation (GRE)?

Answer 3

A tunneling protocol used to encapsulate and route data via a virtual point-to-point connection.

Question 4

What is Internet Protocol Security (IPSec)?

Answer 4

A group of protocols for securing connections between devices.

Question 5

What is Authentication Header (AH)?

Answer 5

Ensures that data packets are from a trusted source and that the data has not been tampered with.

Question 6

What is Encapsulating Security Protocol (ESP)?

Answer 6

Encrypts the IP header and the payload for each packet — unless transport mode is used, in which case it only encrypts the payload.