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ROM
Read-Only Memory.
Router
On IP networks, a device connecting at least two networks, which may or may not be similar. A router is
typically located at a gateway between networks. A router operates on OSI network layer 3. It filters
packets based on the IP address, examining the source and destination IP addresses to determine the
best route on which to forward them. A router is often included as part of a network switch. A router can
also be implemented as software on a computer.
Routing Table
A table listing available routes that is used by a router to determine the best route for a packet.
RTS
Request To Send.
S
Server
In a client/server architecture, a dedicated computer that supplies files or services such as file transfer,
remote login, or printing to clients. Also see client.
Service Provider
A company providing Internet connection services to subscribers.
SMTP
Simple Mail Transfer Protocol is a standard Internet protocol for transferring e-mail.
Static IP Address
An IP address that is permanently assigned to a host. Normally, a static IP address must be assigned
manually. The opposite of Dynamic IP Address.
Station
IEEE 802.11b term for wireless client.
Subscriber
A user who accesses television, data, or other services from a service provider.
Subnet Mask
A methodology that determines what the router will examine for the destination of an IP address. A router
delivers packets using the network address.
Switch
On an Ethernet network, a switch filters frames based on the MAC address, in a manner similar to a
bridge. A switch is more advanced because it can connect more than two segments.