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512K configuration nonvolitile RAM (NVRAM)•
8MB boot flash•
Two PC Card Type II software upgrades•
Ethernet (RJ−45 and MII connectors) for network management access•
Local console and modem ports (DB−25/EIA/TIA−232c)•
The GRP provides the following key functions:
Processes interior gateway protocols (IGPs) such as Intermediate System−to−Intermediate System
(IS−IS), Interior Gateway Routing Protocol (IGRP), Open Shortest Path First (OSPF), and Enhanced
IGRP (EIGRP) to determine the network topology
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Processes external gateway protocols (EGPs) such as Border Gateway Protocol (BGP)•
Creates and maintains the routing table (up to 1 million route entries)•
Distributes and updates Express Forwarding (EF) tables on the LCs and maintains copies of the tables
of each LC for card initialization
•
Handles general maintenance functions such as diagnostics, console support, and LC monitoring•
Processes in−band management through Simple Network Management Protocol (SNMP),
Management Information Base (MIB), Telnet, Bootstrap Protocol (BOOTP), and Trivial File Transfer
Protocol (TFTP)
•
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Access layer
In the campus hierarchical model, the layer where the workstation connects to the network. Hubs or
switches reside at this layer, and workgroups access the network here.
access link
The user’s entry point into the switched network. This link connects the NIC in the user’s local
resource to a switch or other device such as a bridge or hub that in turn connects to the network
backbone or higher−layer switches and routers.
access list
A security feature used with the Cisco IOS to filter traffic types as part of data routing. Access lists
are also used to filter traffic between different VLAN numbers.
active route processor (active−RP)
The active router or route process in HSRP that is currently handling routing decisions and
discovering routes for the attached segments.
address
A set of numbers, usually expressed in binary format, used to identify and locate a resource or device
on a network.
address filter
A feature of the Cisco Catalyst 3000 series. It is a way of using Layer 2 MAC addresses or switching
ports to filter traffic. This process allows you to filter traffic and restrict access without the use of
VLANs. It uses a process similar to access lists on the Cisco IOS. However, you can apply multiple
address filters to the same interface.
Address Resolution Protocol (ARP)
The protocol used to map the IP address to the MAC address.
adjacency table
Works with the FIB and the CEF ASIC to keep a table of nodes that are adjacent to or within a single
hop of the switch. CEF uses the adjacency table to prepend Layer 2 address table information.
administrator
A person responsible for the control and security of the user accounts, resources, and data flow on the
network.
All Routes Explorer (ARE)
On a Token Ring network, if the node of destination is not found on the local network segment, an
ARE frame is sent to all the bridges. Each bridge receiving an ARE updates the frame with a RIF and
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