Network 206.143.5.0 was assigned to the Acme Company to connect to its ISP. The administrator of Acme would like to configure one router with the commands to access the Internet. Which commands could be configured on the Gateway router to allow Internet access to the entire network?
Gateway(config)# ip route 0.0.0.0 0.0.0.0 206.143.5.2
There are actually three different ways to configure the same default route, but only two are shown in the answer. First, you can set a default route with the
0.0.0.0 0.0.0.0 mask and then specify the next hop, as in option A. Or you can use
0.0.0.0 0.0.0.0 and use the exit interface instead of the next hop. Finally, you can use option D with the
ip default-network command.
More questions
1. What is the maximum data rate for the 802.11a standard?
Correct Answer: If no commands have been typed in 1 minute and 35 seconds, the console connection will be closed.
Explanation:
The
exec-timeout command is set in minutes and seconds.
3. You need to create an access list that will prevent hosts in the network range of 192.168.160.0 to 192.168.191.0. Which of the following lists will you use?
Options
A. access-list 10 deny 192.168.160.0 255.255.224.0
The range of 192.168.160.0 to 192.168.191.0 is a block size of 32. The network address is 192.168.160.0 and the mask would be 255.255.224.0, which for an access list must be a wildcard format of 0.0.31.255. The 31 is used for a block size of 32. The wildcard is always one less than the block size.
4. Which of the following is an example of a standard IP access list?
Standard IP access lists use the numbers 1-99 and 1300-1999 and filter based on source IP address only. Option C is incorrect because the mask must be in wildcard format.
5. You are connecting your access point and it is set to root. What does Extended Service Set ID mean?
Options
A. That you have more than one access point and they are in the same SSID connected by a distribution system.
B. That you have more than one access point and they are in separate SSIDs connected by a distribution system.
C. That you have multiple access points, but they are placed physically in different buildings.
D. That you have multiple access points, but one is a repeater access point.
Correct Answer: That you have more than one access point and they are in the same SSID connected by a distribution system.
Explanation:
Extended Service Set ID means that you have more than one access point and they all are set to the same SSID and all are connected together in the same VLAN or distribution system so users can roam.
6. Which of the following series of commands will restrict Telnet access to the router?
Options
A. Lab_A(config)#access-list 10 permit 172.16.1.1 Lab_A(config)#line con 0 Lab_A(config-line)#ip access-group 10 in
B. Lab_A(config)#access-list 10 permit 172.16.1.1 Lab_A(config)#line vty 0 4 Lab_A(config-line)#access-class 10 out
C. Lab_A(config)#access-list 10 permit 172.16.1.1 Lab_A(config)#line vty 0 4 Lab_A(config-line)#access-class 10 in
D. Lab_A(config)#access-list 10 permit 172.16.1.1 Lab_A(config)#line vty 0 4 Lab_A(config-line)#ip access-group 10 in
Telnet access to the router is restricted by using either a standard or extended IP access list inbound on the VTY lines of the router. The command
access-class is used to apply the access list to the VTY lines.
7. A network administrator is connecting hosts A and B directly through their Ethernet interfaces, as shown in the illustration. Ping attempts between the hosts are unsuccessful. What can be done to provide connectivity between the hosts?
A crossover cable should be used in place of the straight-through cable.
A rollover cable should be used in place of the straight-through cable.
The subnet masks should be set to 255.255.255.192.
First, if you have two hosts directly connected, as shown in the graphic, then you need a crossover cable. A straight-through cable won't work. Second, the hosts have different masks, which puts them in different subnets. The easy solution is just to set both masks to 255.255.255.0 (/24).
8. Which of the following describe router functions?
Routers provide packet switching, packet filtering, internetwork communication, and path selection.
9. Suppose that you have a customer who has a central HQ and six branch offices. They anticipate adding six more branches in the near future. They wish to implement a WAN technology that will allow the branches to economically connect to HQ and you have no free ports on the HQ router. Which of the following would you recommend?
The key is "there are no free ports" on your router. Only Frame Relay can provide a connection to multiple locations with one interface, and in an economical manner no less.
10. The Acme Corporation is implementing dial-up services to enable remote-office employees to connect to the local network. The company uses multiple routed protocols, needs authentication of users connecting to the network, and since some calls will be long distance, needs callback support. Which of the following protocols is the best choice for these remote services?
PPP is your only option, as HDLC and Frame Relay do not support these types of business requirements. PPP provides dynamic addressing, authentication using PAP or CHAP, and callback services.