TP-Link TL-ER6020 manual Appendix C Glossary, Description, Layer, AH（Authentication Header）

Appendix C Glossary

Glossary

Description

	DSL (Digital Subscriber		A technology that allows data to be sent or received over
	Line)		existing traditional phone lines.
			Application Level Gateway (ALG) is application specific
	ALG （ Application	Layer	translation agent that allows an application on a host in one
	Gateway）		address realm to connect to its counterpart running on a host in
			different realm transparently.
A
	ARP （Address Resolution		Internet protocol used to map an IP address to a MAC address.
	Protocol）
			A security protocol that provides data authentication and
	AH（Authentication Header）		optional anti-replay services. AH is embedded in the data to be
			protected (a full IP datagram).
	DDNS （ Dynamic Domain		The capability of assigning a fixed host and domain name to a
	Name Server）		dynamic Internet IP address.
	DHCP （ Dynamic	Host	A protocol that automatically configure the TCP/IP parameters
	Configuration Protocol）		for the all the PCs that are connected to a DHCP server.
D
			A Demilitarized Zone allows one local host to be exposed to the
	DMZ（Demilitarized Zone）		Internet for a special-purpose service such as Internet gaming
			or videoconferencing.
	DNS（Domain Name		An Internet Server that translates the names of websites into IP
	Server）		addresses.
	ESP（Encapsulating		Security protocol that provides data privacy services, optional
E			data authentication, and anti-replay services. ESP encapsulates
	Security Payload）
			the data to be protected.
F	FTP（File Transfer		Application protocol, part of the TCP/IP protocol stack, used for
	Protocol）		transferring files between network nodes.
G	GMT （ Greenwich	Mean	It is a term originally referring to mean solar time at the Royal
	Time）		Observatory in Greenwich, London.
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