Virtual Private Networks

Question 1

VPN

Answer 1

Virtual Private Network

Secure connection between remote end and private network.

Question 2

VPN Concentrator

Answer 2

Advanced router that handles multiple connections (tunnels) into a network.

Question 3

IP Tunnel

Answer 3

Secure VPN connection between two endpoints

Question 4

Remote Access VPN

Answer 4

Facilitates network access for users in remote office networks.
Client initiates the connection.

Question 5

Site-to-Site VPN

Answer 5

Virtual link from one site to another. Replaces a WAN type of connection.
Requires network hardware (router / firewall) to create and maintain connection.

Question 6

Hub-and-Spoke Network

Answer 6

Traditional site-to-site VPN

Question 7

DMVPN

Answer 7

Dynamic Multipoint Virtual Private Network
Spoke-to-spoke network
Data exchanged between sites without passing through organization’s VPN

Question 8

Client-to-Site VPN

Answer 8

Mobile users remotely access information from home network

Question 9

GRE

Answer 9

Generic Routing Encapsulation
Early tunneling protocol (1994)
Used in site-to-site VPNs. Encapsulates 20 types of protocols.

Question 10

PPP

Answer 10

Point-to-Point Protocol

Dial-up connection with ISP

Question 11

PAP

Answer 11

Password Authentication Protocol
Multifactor authentication protocol
Unencrypted (clear-text) authentication method

Question 12

CHAP

Answer 12

Challenge Handshake Authentication Protocol

Encrypted authentication, uses MD5 file hashing

Question 13

SHA

Answer 13

Secure Hash Algorithm
Secure Hash Algorithm
Required for certain government applications
SHA-0, -1, -2, -3

Question 14

EAP

Answer 14

Extensible Authentication Protocol

A PPP authentication method

Question 15

PPTP

Answer 15

Point-to-Point Tunneling Protocol

Question 16

L2TP

Answer 16

Layer 2 Tunneling Protocol

Merges PPTP and L2F

Question 17

IPSEC

Answer 17

Internet Protocol Security
Encrypted end-to-end connection
Uses AH and ESP

Question 18

AH

Answer 18

Authentication Header

Guarantees authenticity of IP packets. uses one-way hash algorithm.

Question 19

ESP

Answer 19

Encapsulating Security Payload

Provides confidentiality to data with encryption such as DES, 3DES, AES

Question 20

AES

Answer 20

Advanced Encryption Standard

Question 21

IKE

Answer 21

Internet Key Exchange

Manages negotiation between devices establishing IPsec tunnels

Question 22

ISAKMP

Answer 22

Internet Security Association and Key Management Protocol