D-Link DSR-150 DSR-150 User Manual - Page 198

Unified Services Router User Manual Appendix A. Glossary ARP CHAP DDNS DHCP DNS FQDN FTP HTTP IKE IPs e c ISAKM P ISP MAC Address MTU NAT Ne tBIOS NTP PAP Address Resolution Protocol. Broadcast protocol for mapping IP addresses to MAC address es. Challenge-Handshake Authentication Protocol. Protocol for authenticating users to an ISP. Dynamic DNS. Systemfor updating domain names in real time. Allow s a domain name to be assigned to a device w ith a dynamic IP address. Dynamic Host Configuration Protocol. Protocol for allocating IP addresses dynamically so that addresses can be reused w hen hosts no longer need them. Domain Name System. Mechanism f or translating H.323 IDs, URLs, or e-mail IDs into IP addresses. Also used to assist in locating remote gatekeepers and to map IP addresses to hostnames of administrative domains. Fully qualified domain name. Complete domain name, including the host portion. Example: serverA.companyA.com. File Transfer Protocol. Protocol for transferring files between network nodes. Hypertext Transfer Protocol. Protocol used by w eb browsers and web servers to transfer files. Internet Key Exchange. Mode for securely exchanging encryption keys in ISAKMP as part of building a VPN tunnel. IP security. Suite of protocols for securing VPNtunnels by authenticating or encrypting IP packets in a data stream. IPsec operates in either transport mode (encrypts payload but not packet headers) or tunnel mode (encrypts both payload and packet headers). Internet Key Exchange Security Protocol. Protocol for establishing security associations and cryptographic keys on the Internet. Internet service provider. Media-access-control address. Unique physical-address identifier attached to a netw ork adapter. Maximum transmission unit. Size, in bytes, of the largest packet that can be passed on. The MTU for Ethernet is a 1500-byte packet. Netw ork Address Translation. Process of rewriting IP addresses as a packet passes through a router or firew all. NAT enables multiple hosts on a LAN to access the Internet using the single public IP address of the LAN's gatew ay router. Microsoft Window s protocol for file sharing, printer sharing, messaging, authentication, and name resolution. Netw ork Time Protocol. Protocol for synchronizing a router to a single clock on the netw ork, know n as the clock master. Passw ord Authentication Protocol. Protocol for authenticating users to a remote access server or ISP. 196