CH9 + 10 IP Routing and Routing Protocols Flashcards
How do you show the routing table on a router
show ip route or sh ip route
how do you display ARP cache on a router
show ip arp or sh ip arp
Name the distance vector protocols
RIPv1, RIPv2, IGRP
Name the link state routing protocols
OSPF, IS-IS
Name the hybrid routing protocols
EIGRP, BGP
What type of routing protocol finds the best path to a remote network by judging the hops
Distance vector
____Sends routing table updates every 30 seconds, uses a hop count of max 15 to determine best route.
RIP, RIPv2
___Uses classfull routing only
RIP
What is not supported with RIP____,____,____
VSLM, authentication, discontinuous networks.
Bellman Ford algorithm and use of a flat network is used with
RIP
What routing protocol supports VSLM, and discontinuous networks?
RIPv2
____ is a classless protocol that maintains two additional tables aside from the routing table
LInk State
What protocol uses Dijkstra algorithm?
OSPF
OSPF supports
IPv4, IPV6, VSLM/CIDR, unlimited hop count.
What are the main benefits with OSPF?
Highly scalable minimizes route updates uses loopback(logical int) VLSM Bandwidth as path metric over hops
What protocol floods info throughout a network of routers which then each router builds a picture of the networks topology?
IS-IS
Unlike OSPF IS-IS uses ____ to provide connectionless delivery of data packets between routers
Connectionless Network Service(CLNS)
Why is IS-IS preferred over OSPF by ISP’s
It can run IPv4 and IPv6 without creating a sep[erate database for each protocol making it much more efficient for larger networks.
What type of protocol uses elements from distance vector and link state?
Hybrid
BGP is the ___ of the internet
core routing protocol
First hop redundancy protocols(FHRPs) work by
Giving you a way to configure more then one physical router to appear as if they where only a single logical one.
Host standby routing protoco(HSRP) is
a Cisco proprietary protocol that provides a redundant gateway for hosts on a local subnet.
What allows for two or more routers into a standby group that share same IP and MAC address
HSRP
Virtual Redundancy Routing protocol(VRRP) provides
A redundant gateway for hosts on a local subnet; open-standard
What allows for classless routiong
Variable length subnet masks(VSLM). VSLM sends the subnet mask with route updates
A collection of networks or subnets in the same administrative domain is called an____
Autonomous system(AS)
___ Is used to rate the trustworthiness of routing information received on one router from its neighboring router. 0 being the most trustworthy 255 no traffic allowed
Administrative distance(AD)
What interface is most trustworthy
Connected interface 0
What interface is second most trustworthy
Static Route 1
External BGP has a default AD of ____
20
Destination Unknown has an AD of
255
Different routing protocols default AD
External BGP 255 Internal EIGRP 90 IGRP 100 OSPF 110 ISIS 115 RIP 120 External EIGRP 170 Internal BGP 200
What is the function of a distribution router?
They collect data from end user locations and redistribute them to an enterprise location such as a company’s headquarters
______ combines an ethernet data path with in IS-IS link state control protocol running between shortest bath bridges
Shortest path bridging(SPB)
What replaces STP
SPB because it simplify’s network creation while enabling multipath routing.
