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- what does layer 3 switching refer to
- a class of high-performance switching routers optimized for compus area network
what caused the introduction of layer 3 switching
bottlenecks caused by routers
what does CRC stand for
cyclic redundancy check
what does FCS stand for
frame check sequence
what does pps stand for
packet per second
what does ASIC stand for
application specific integrated circuits
what are the two basic types of layer 3 switching
- packet-by-packet routing
- flow-based packet routing
what is used in layer 3 switches, just like routers, to populate these layer 3 routing tables
dynamic routing protocol
what four changes in network topologies cause routing tables to automatically adjust themselves
- link failures
- device failures
- additions to the network
- deletions from the network
what does PIM stand for
protocol independent multicast
what operates independent of the unicast routing protocols
what is packet-by-packet routing
Packet-by-Packet Routing is a high performance implementation of standard routing functions.
what does flow-based routing
Flow-based Routing is a proprietary implementation that relies on short-cutting the router function when forwarding packets over the network.
what is the multi layer switch protocol of choice
is the Protocol Independent Multicast (PIM).
what does EIGRP stand for
enhanced interior gateway routing protocol
what term is used by Cisco to describe the category of routing protocols in which EIGRP resides
what multicast address is used by EIGRP
how often are EIGRP hello packets sent across ethernet
- multicast every 5 seconds
- unicast every 60 seconds
what are the three tables used by EIGRP
- EIGRP neighbor table
- EIGRP topology table
- routing table
what are the five components of the EIGRP composite metric
what two components are used by default in the EIGRP composite metric
what is the name of an EIGRP best or "primary" route
- the routes with the lowest metric becomes the best or "primary" route and added to the routing table
what does the acronym DUAL stand for
diffusing update algorithm
what does the acronym OSPF stand for
open shortest path first
what category of routing protocol is OSPF
IP routing protocol
what multicast addresses are used by OSPF
what metric is used by OSPF
cost (based on bandwidth)
what does the acronym LSA stand for
what area must all OSPF areas maintain a direct connection with
area 0 (backbone area)
what does the acronym ABR stand for
area border router
what does AS stand for
what does IGT stand for
interior gateway protocol
how many hops (routers) does a RIP network considered unreachable
spans more than 15 hops (15 routers)
what is area border router ABR
The Area Border Router (ABR) maintains topology databases for every Area that an interface is connected to.
what OSPF features are included to improve performance in large networks
- (1) Designated Router (DR) Election
- (2) Backup Designated Router (BDR) Election
- (3) DR other Assignment
what does DR stand for
what does BDR stand for
Backup Designated Router (BDR
what other variants of the "stub area" does OSPF provide
- Totally Stubby
- Totally, Not-So-Stubby
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