Ch 5 Cisco Routing and Switching Essentials
What would be the best summary route for the following networks? 10.50.168.0/23 10.50.170.0/23 10.50.172.0/23 10.50.174.0/24
10.50.168.0/21
Refer to the exhibit. A network administrator needs to configure router-on-a-stick for the networks that are shown. How many subinterfaces will have to be created on the router if each VLAN that is shown is to be routed and each VLAN has its own subinterface?
4
A small college uses VLAN 10 for the classroom network and VLAN 20 for the office network. What is needed to enable communication between these two VLANs while using legacy inter-VLAN routing?
A router with at least two LAN interfaces should be used.
Refer to the exhibit. What two commands will change the next-hop address for the 10.0.0.0/8 network from 172.16.40.2 to 192.168.1.2? (Choose two.)
A(config)# ip route 10.0.0.0 255.0.0.0 192.168.1.2 A(config)# no ip route 10.0.0.0 255.0.0.0 172.16.40.2
Refer to the exhibit. The network administrator needs to configure a default route on the Border router. Which command would the administrator use to configure a default route that will require the least amount of router processing when forwarding packets?
Border(config)# ip route 0.0.0.0 0.0.0.0 s0/0/1
Refer to the exhibit. After attempting to enter the configuration that is shown in router RTA, an administrator receives an error and users on VLAN 20 report that they are unable to reach users on VLAN 30. What is causing the problem?
RTA is using the same subnet for VLAN 20 and VLAN 30.
Refer to the exhibit. Communication between the VLANs is not occurring. What could be the issue?
The Gi1/1 switch port is not in trunking mode.
Refer to the exhibit. A network administrator is verifying the configuration of inter-VLAN routing. Users complain that PC2 cannot communicate with PC1. Based on the output, what is the possible cause of the problem?
The encapsulation dot1Q 5 command contains the wrong VLAN.
Refer to the exhibit. Router RA receives a packet with a source address of 192.168.1.35 and a destination address of 192.168.1.85. What will the router do with this packet?
The router will forward the packet out interface FastEthernet 0/1.2.
Refer to the exhibit. A router-on-a-stick configuration was implemented for VLANs 15, 30, and 45, according to the show running-config command output. PCs on VLAN 45 that are using the 172.16.45.0 /24 network are having trouble connecting to PCs on VLAN 30 in the 172.16.30.0 /24 network. Which error is most likely causing this problem?
There is an incorrect IP address configured on GigabitEthernet 0/0.30.
What type of route allows a router to forward packets even though its routing table contains no specific route to the destination network?
default route
Refer to the exhibit. The network engineer for the company that is shown wants to use the primary ISP connection for all external connectivity. The backup ISP connection is used only if the primary ISP connection fails. Which set of commands would accomplish this goal? Choose either A, B, C, or D.
ip route 0.0.0.0 0.0.0.0 s0/0/0 ip route 0.0.0.0 0.0.0.0 s0/1/0 10
Which type of inter-VLAN communication design requires the configuration of multiple subinterfaces?
router on a stick
Refer to the graphic. Which command would be used on router A to configure a static route to direct traffic from LAN A that is destined for LAN C?
A(config)# ip route 192.168.4.0 255.255.255.0 192.168.3.2
Which two statements describe classful IP addresses? (Choose two.)
All subnets in a network are the same size. The number of bits used to identify the hosts is fixed by the class of the network.
Refer to the exhibit. Which is the best way for PC A and PC B to successfully communicate with sites on the Internet?
Configure a default route from R1 to ISP and a static route from ISP to R1.
Refer to the exhibit. A network administrator is configuring RT1 for inter-VLAN routing. The switch is configured correctly and is functional. Host1, Host2, and Host3 cannot communicate with each other. Based on the router configuration, what is causing the problem?
IP addresses on the subinterfaces are incorrectly matched to the VLANs.
What is a characteristic of a routed port on a Layer 3 switch?
It is not assigned to a VLAN.
What is a disadvantage of using multilayer switches for inter-VLAN routing?
Multilayer switches are more expensive than router-on-a-stick implementations.
Refer to the exhibit. The small company shown uses static routing. Users on the R2 LAN have reported a problem with connectivity. What is the issue?
R1 needs a static route to the R2 LAN.
Refer to the exhibit. Which default static route command would allow R1 to potentially reach all unknown networks on the Internet?
R1(config)# ipv6 route ::/0 G0/1 fe80::2
Which statement describes a disadvantage of using router subinterfaces for inter-VLAN routing?
Routed traffic must contend for bandwidth on a single router interface.
The network administrator configures the router with the ip route 172.16.1.0 255.255.255.0 172.16.2.2 command. How will this route appear in the routing table?
S 172.16.1.0 [1/0] via 172.16.2.2
What are two advantages of static routing over dynamic routing? (Choose two.)
Static routing is more secure because it does not advertise over the network. Static routing uses fewer router resources than dynamic routing.
Refer to the exhibit. A network administrator has configured router CiscoVille with the above commands to provide inter-VLAN routing. What command will be required on a switch that is connected to the Gi0/0 interface on router CiscoVille to allow inter-VLAN routing?
switchport mode trunk
