Aug 30, 2018 · Authentication and encryption protocol for IPSec that encrypts Internet Protocol (IP) packets and ensures their integrity. A protocol for communication between two computers. Typically, the connection from the client to the server is over a telephone line. A protocol that secures IP communications by authenticating and encrypting each IP packet.
Question 23 000000 out of 008000 points Which of the following is the definition from AA 1
Internet Protocol Security (IPSec) is a security standard commonly implemented to create virtual private networks (VPNs). IPSec allows packets to be securely exchanged over the Internet Protocol (IP) at the Network layer (Layer 3) rather than at the Application layer (Layer 7) of the Open Systems Interconnection (OSI) model.
The default automated key management protocol for IPsec is referred to as ISAKMP/Oakley and consists of the following elements: • Oakley Key Determination Protocol: Oakley is a key exchange protocol based on the Diffie-Hellman algorithm but providing added security. Oakley is generic in that it does not dictate specific formats.
IPSec can work in either tunnel mode or transport mode. IPSec uses Encapsulation Security Payload (ESP) and Authentication Header (AH) as security protocols for encapsulation. The IPSec framework is used in a virtual private network (VPN) implementation to secure transmissions.
Explanation: A proxy server acts as an Internet gateway, firewall, and Internet caching server for a private network. Hosts on the private network contact the proxy server with an Internet Web site request. The proxy server checks its cache to see if a locally stored copy of the site is available.
A DMZ can also be implemented with two firewalls. In this configuration, one firewall is connected to a private network and a DMZ segment, and the other firewall is connected to the Internet and the DMZ segment. To implement a firewall, you should first develop and implement a firewall policy.
Explanation: A hardware firewall is also referred to as an appliance firewall. Appliance firewalls are often designed as stand-alone black box solutions that can be plugged in to a network and operated with minimal configuration and maintenance.
Firewalls can be used to create demilitarized zones (DMZs). A DMZ is a network segment placed between an internal network and a public network, such as the Internet. DMZs allow remote access to services while segmenting access to the internal network. Typically, either one or two firewalls are used to create a DMZ.
Often a VPN is implemented with a firewall to allow remote employees to connect to local resources. A VPN concentrator is the device that creates the VPN.
The router acts as a screening device, and the firewall is the screen host. Screened subnet is another term for a demilitarized zone (DMZ). Two firewalls are used in this configuration: one firewall resides between the public network and DMZ, and the other resides between the DMZ and private network.".