Routing Fundamentals Flashcards
Where does a router store the paths to different networks?
a routing table
How do you override a static route over a dynamic route learned from IGRP?
By configuring the static route with an administrative distance greater than 100
Which Cisco IOS global configuration command will configure 12.10.13.1 as the default gateway on the router?
ip default-gateway 12.10.13.1
Which routing protocols do not include the subnet mask in the route advertisement?
Classful routing protocols
Given two static routes, one with administrative distance 90 and one with administrative distance 100, which static route will override the other?
The static route with administrative distance of 90
What is the primary difference between routing and bridging?
Bridging take place at OSI Layer 2, and routing takes place at OSI Layer 3.
What is the default administrative distance for External Enhanced Interior Gateway Routing Protocol (EIGRP)?
170
Which Cisco Internetwork Operating System (IOS) command is used to view the Open Shortest Path First (OSPF) link-state advertisements (LSAs) waiting to be re-sent?
the show ip ospf retransmission-list command
Which routes are used for routing packets destined for networks not listed in the routing table?
default routes
What is the term used for the number of devices through which a packet passes when traveling from a source to a destination?
hop count
Which two routing protocols are Cisco Systems’ proprietary routing protocols?
Enhanced Interior Gateway Routing Protocol (EIGRP) and Interior Gateway Routing Protocol (IGRP)
Each router interface makes a____________ domain and each switch interface creates a ___________ domain
Broadcast, collision
Which ip route command will create a default route to network 191.31.23.1?
ip route 0.0.0.0 0.0.0.0 191.31.23.1
Routing metrics are characteristics of which type of protocols?
routing protocols
What is the default administrative distance for Enhanced Interior Gateway Routing Protocol (EIGRP)?
90
To what interface does a host send a packet if the host determines the destination IP address is in another subnet?
To the default gateway of the local router interface
Which routing metric enables a router to make a routing decision based on the extent to which a link is busy?
load
What is the term used for the parameters by which a router determines the best path to the destination host?
routing metrics
Which Cisco Internetwork Operating System (IOS) command is used to view the current state of the active routing protocol process?
the show ip protocols command
What are the only types of routes that appear in a routing table automatically?
Routes to directly connected networks appear without the administrator creating the routes and without the aid of dynamic routing protocols.
Which Cisco Internetwork Operating System (IOS) command is used to view the contents of the IP multicast routing table?
the show ip mroute command
Which Cisco Internetwork Operating System (IOS) command is used to view the status of the IPv6 routing protocols?
the show ipv6 protocols command
What is the default administrative distance (AD) value for unknown origin routes?
255
Which Cisco Internetwork Operating System (IOS) command will enable a Cisco router to select a default route when routing to an unknown subnet of a network for which it knows the major network?
the ip classless command
Which routing metric enables a router to decide the best path through the network based on the maximum attainable throughput on a link?
bandwidth
What does “C” imply in the show ip route command output?
directly connected routes
Which Cisco IOS command will enable a router to copy the configuration files from NVRAM to its RAM?
the copy startup-configuration running-configuration command
What is the default administrative distance of a static route?
One
Which two routing protocols perform equal and unequal load balancing by default?
Enhanced Interior Gateway Routing Protocol (EIGRP) and Interior Gateway Routing Protocol (IGRP)
Which Cisco Internetwork Operating System (IOS) command is used to reinstall a previously removed interior or exterior route?
the discard-route command
What is the default administrative distance (AD) value for a directly connected interface?
0
Which Cisco Internetwork Operating System (IOS) command is used to view the IPv6 routing table?
the show ipv6 route command
When a packet is being transferred across a network, the _______________ addresses in the frame header keep changing, but the ___________ addresses in the packet do not.
MAC, IP
How would you identify default network in the show ip route command output?
the route to the default network is flagged and is denoted by an asterisk (*).
What is the default administrative distance for static routes?
1
What does “S” imply in the show ip route command output?
static route
Which routing protocols include the subnet mask in the route advertisement and support Variable Length Subnet Masking (VLSM)?
Classless routing protocols
What is the default administrative distance for Open Shortest Path First (OSPF)?
110
What are the two ways in which a routing table can be populated?
statically and dynamically
What is the default administrative distance (AD) value for an Exterior Gateway Protocol (EGP) route?
140
What is the first criterion that a router uses to choose the best path if two protocols provide route information for the same destination?
Administrative Distance
What is the default administrative distance for directly connected interfaces?
Zero
Which metric is used by Routing Information Protocol (RIP) for its path selection?
the Hop-count metric
What is another term for the default gateway?
gateway of the last resort
How many broadcast domains are present in a network with no router?
1
