Acer 700 Series User Manual page 88

Compression
The mechanism to reduce the amount of data traffic sent over the WAN by processing
each packet and reduce its size before it is sent out to the WAN, and to restore its
original content and size when a compressed packet is received from over the WAN.
This is so as to save network bandwidth which is relatively scarce and expensive.
Default IP Route
An IP route defined in the IP routing table such that when a packet is received for
routing, if the router can not find the destination network in its routing table, the
packet will be forwarded to the default IP router for routing. Such a router often has a
more complete routing table, and therefore is "more knowledgeable" about how to
route a packet.
Edge Router
A router that resides at the edge of a LAN that is used to communicate with the WAN.
Encryption
Encryption allows data to be encrypted before they are sent out to the WAN, and
decrypted when they are received from over the WAN. This is to secure and protect
private data from being pirated over the WAN.
These routers implement such a feature, which can be enabled or disabled on a per
serial interface basis (i.e., a frame relay DLCI or a point-to-point leased line
connection). Because of lack of a standard encryption negotiation scheme, this feature
requires the use of the same type of router on the other end of the encrypted link(s),
and the use of the same encryption algorithm and key for each encrypted link
(different links can use different algorithm and keys).
Flash Memory
A special read-write memory that keeps its content after power is removed from it.
Because of its easy re-programmable nature, it is often used to store programs
(firmware) for embedded products, so that firmware upgrade becomes an easy
process.
IP Multicast
An IP based protocol that allows one copy of data sent out to multiple destinations
through a network consisting of multicast-capable routers. Those who wish to
"subscribe" to a particular multicast service will have to register through the IP
Multicast protocol.
ICMP
Part of the TCP/IP protocol suite, which is often used for error reporting and control
purposes.
IGMP
IP Group Multicast Protocol, a protocol that is used together with the IP multicasting
feature.
AcerRouter 700 User Guide