| Glossary |
| for routing, while the host number addresses an individual |
| host within the network or sub network. A subnet mask is |
| used to extract network and sub network information from |
| the IP address. |
IP packet filtering | This is a set of facilities in network equipment that allows the |
| filtering of data packets based on source/destination |
| addresses, protocol, TCP port number and other parameters. |
| Packet filtering is one of the main functions of a firewall. |
IPsec | Short for IP Security Protocol, IPsec is an extended IP |
| protocol that provides encrypted security services. These |
| services enable authentication, as well as for access and |
| trustwothiness control. IPsec provides similar services as |
| SSL, but it works on a network layer. Through IPsec you can |
| create encrypted tunnels (VPN) or encrypt traffic between |
| two hosts. |
ISDN | A set of communications standards allowing a single wire or |
| optical fibre to carry voice, digital network services and |
| video. ISDN is intended to eventually replace the plain old |
| telephone system. |
Kerberos | Kerberos was created by MIT as a solution to network |
| security problems. The Kerberos protocol uses strong |
| cryptography so that a client can prove its identity to a server |
| (and vice versa) across an insecure network connection. |
| After a client and server has used Kerberos to prove their |
| identity, they can also encrypt all of their communications to |
| assure privacy and data integrity as they go about their |
| business. |
LDAP | Lightweight Directory Access Protocol. A software protocol |
| for enabling anyone to locate organizations, individuals, and |
| other resources such as files and devices in a network, |
| whether on the Internet or on a corporate intranet. |
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