Appendix A. Glossary - D-Link DSR-150 User Manual

Unified Services Router

Appendix A. Glossary

Address Resolution Protocol. Broadcast protocol for mapping IP addresses to MAC addresses.
ARP
Challenge-Handshake Authentication Protocol. Protocol for authenticating users to an ISP.
CHAP
Dynamic DNS. System for updating domain names in real time. Allows a domain name to be
DDNS
assigned to a device with a dynamic IP address.
Dynamic Host Configuration Protocol. Protocol for allocating IP addresses dynamically so that
DHCP
addresses can be reused when hosts no longer need them.
Domain Name System. Mechanism for 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
DNS
hostnames of administrative domains.
Fully qualified domain name. Complete domain name, including the host portion. Example:
FQDN
serverA.companyA.com.
File Transfer Protocol. Protocol for transferring files between network nodes.
FTP
Hypertext Transfer Protocol. Protocol used by web browsers and web servers to transfer files.
HTTP
Internet Key Exchange. Mode for securely exchanging encryption keys in ISAKMP as part of
IKE
building a VPN tunnel.
IP security. Suite of protocols for securing VPN tunnels by authenticating or encrypting IP
packets in a data stream. IPsec operates in either transport mode (encrypts payload but not
IPsec
packet headers) or tunnel mode (encrypts both payload and packet headers).
Internet Key Exchange Security Protocol. Protocol for establishing security associations and
ISAKMP
cryptographic keys on the Internet.
Internet service provider.
ISP
Media-access-control address. Unique physical-address identifier attached to a network
MAC Address
adapter.
Maximum transmission unit. Size, in bytes, of the largest packet that can be passed on. The
MTU
MTU for Ethernet is a 1500-byte packet.
Network Address Translation. Process of rewriting IP addresses as a packet passes through a
router or firewall. NAT enables multiple hosts on a LAN to access the Internet using the single
NAT
public IP address of the LAN's gateway router.
Microsoft Windows protocol for file sharing, printer sharing, messaging, authentication, and
NetBIOS
name resolution.
Network Time Protocol. Protocol for synchronizing a router to a single clock on the network,
NTP
known as the clock master.
Password Authentication Protocol. Protocol for authenticating users to a remote access server
PAP
or ISP.
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User Manual