1.4c - Other Useful Protocols

Flashcards covering key networking protocols and their functions as discussed in the lecture.

ICMP

Internet Control Message Protocol; used to check the status of devices on a network.

ping

A command that uses ICMP to check if a device is alive and operating on the network.

GRE

Generic Routing Encapsulation; a protocol used to create tunnels in VPNs.

VPN Concentrator

A device that provides encryption and decryption for data sent across VPN tunnels.

IPSec

Internet Protocol Security; a protocol used to encrypt data over VPNs.

AH (Authentication Header)

A protocol in IPSec that provides data integrity and authenticity.

ESP (Encapsulation Security Payload)

A protocol in IPSec that encrypts data and provides integrity and authentication.

IKE (Internet Key Exchange)

The process used to agree on encryption keys for a VPN tunnel.

Security Association (SA)

An agreement between two parties on the parameters of the security mechanisms used.

Transport Mode

An IPSec mode where only the payload of the IP packet is encrypted.

Tunnel Mode

An IPSec mode where the entire IP packet, including original headers, is encrypted.

Diffie-Hellman

A method used in phase one of IKE to generate a shared secret key.

ISAKMP

Internet Security Association and Key Management Protocol; part of the IKE process.