Datasheet

(DSL), cable modem, or wireless connection to the Internet. PPPOE combines
the Point-to-Point Protocol (PPP), commonly used in dialup connections, with
the Ethernet protocol, which supports multiple users in a local area network.
The PPP protocol information is encapsulated within an Ethernet frame.
Proxy Server
A proxy server is associated with or part of a gateway server that separates
the enterprise network from the outside network and a firewall server that
protects the enterprise network from outside intrusion. To the user, the proxy
server is invisible.
SMTP
SMTP (Simple Mail Transfer Protocol) is a TCP/IP protocol used in sending
and receiving e-mail. However, since it is limited in its ability to queue
messages at the receiving end, it is usually used with one of two other
protocols, POP3 or IMAP, that let the user save messages in a server mailbox
and download them periodically from the server. In other words, users typically
use a program that uses SMTP for sending e-mail and either POP3 or IMAP
for receiving e-mail.
Subnet Mask
Once a packet has arrived at an organization's gateway or connection point
with its unique network number, it can be routed within the organization's
internal gateways using the subnet number as well. The subnet mask allows
router know whether two IP addresses belong to the same subnet.
TCP/IP
TCP (Transmission Control Protocol) is a set of rules (protocol) used along
with the Internet Protocol (IP) to send data in the form of message units
between computers over the Internet. While IP takes care of handling the
actual delivery of the data, TCP takes care of keeping track of the individual
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