Chapter 11 Flashcards with Answers
Unlock all answers in this set
Unlock answersquestion
If the SONET (OC-1) base data rate is 51.84 mbps, how much data can the Optical Carrier level 12 (OC-12) transfer in one second?
answer
622.08 Mb
question
To access the Internet through the PSTN, what kind of connectivity device must you use?
answer
Modem
question
Which of the following are characteristics of ATM?
answer
Uses fixed-length cells of 53 bytes and adds labels to data units.
question
Which four of the following are the responsibility of the WAN service provider?
answer
PSE, CO, DCE, Local Loop
question
Which network type divides transmitted data into smaller pieces and allows for multiple communications of the network medium?
answer
Packet switched
question
Which of the following WAN technologies provides packet switching over high-quality digital lines at speeds greater than 1.544 Mbps?
answer
Frame Relay
question
Which WAN connection types use digital communications over public telephone lines?
answer
ISDN and DSL
question
Which of the following is true of multiprotocol label switching?
answer
It can carry ATM, SONET, and Ethernet traffic as well as CEF is required for all mpls-enabled cisco routers.
question
What is the maximum data rate of an ISDN BRI line?
answer
128
question
Which of the following are characteristics of ISDN?
answer
It provides enough bandwidth to transmit data at higher speeds than standard modems and analog lines, it lets you transmit voice, video, and data over the same lines, as well as it is a dialup service that uses existing copper wires for the local loop.
question
You have a series of WAN links that connects your site to multiple other sites. Each remote site is connected to your site using a dedicated link. What type of communication is being used?
answer
Point to point
question
Which of the following devices is used on a WAN to convert synchronous serial signals into digital signal?
answer
CSU/DSU
question
Which of the following WAN technologies provides digital dial-up connections on two 64 kbps data channels?
answer
ISDN BRI
question
A healthcare organization provides mobile clinics throughout the world. Which technology should you select to transfer patient statistical data to a central database via the internet to ensure network connectivity for any clinic located anywhere in the world, even remote areas?
answer
Satellite
question
Which of the following is the most susceptible to interference related to atmospheric conditions?
answer
Satellite
question
Which of the following internet access technologies support simultaneous voice and data traffic over the same physical line?
answer
ADSL and ISDN BRI
question
Which of the following internet services provides equal upload and download bandwidth?
answer
SDSL
question
Which of the following are characteristics of VDSL?
answer
Supports both data and voice at the same time, and unequal download and upload speeds.
question
Which of the following technologies does GSM use to allow multiple connections on the same frequency?
answer
Time division multiple access
question
Which of the following cellular network types does not provide internet connectivity?
answer
2G
question
Which of the following cellular network types use MIMO to increase 3g data throughput?
answer
LTE and HSPA+
question
Which of the following describe the EDGE cellular technology?
answer
Offers speeds of 400-1000 Kbps and the first internet compatible technology
question
Which of the following internet connection technologies requires that the location be within a limited distance of the telephone company central office?
answer
DSL
question
Which of the following services are available regardless of whether the telephone company network is available?
answer
Cable modem
question
Which type of internet service uses the DOCSIS specification?
answer
Coaxial cable
question
Which of the following forms of networking are highly susceptible to eavesdropping and must be secured accordingly?
answer
Wireless
question
Which of the following are methods for providing centralized authentication, authorization, and accounting for remote access?
answer
RADIUS and tacacs+
question
You have decided to implement a remote access solution that uses multiple remote access servers. You want to implement RADIUS to centralize remote access authentication and authorization.
answer
Configure the remote access servers as RADIUS clients.
question
Which of the following protocols can be used to centralize remote access authentication?
answer
TACACS
question
You want to set up a service to allow multiple users to dial in to the office server from modems on their home computers. What service should you implement?
answer
RAS
question
You are configuring your computer to dial up to the internet. What protocol should you use?
answer
PPP
question
Which of the following protocols or services is commonly used on cable internet connections for user authentication?
answer
PPPoE
question
You often travel away from the office. While traveling, you would like to use a modem on your laptop computer to connect directly to a server in your office and access files on that server you need.
answer
Remote access
question
You have just signed up for internet access using a local provider that gives you a fiber optic line into your house. From there, ethernet and wireless connections are used to create a small network within your home.
answer
PPPoE
question
RADIUS is primarily used for what purpose?
answer
Authenticating remote clients before access to the network is granted
question
Which of the following is a characteristic of TACACS+?
answer
Encrypts the entire packet, not just authentication packets
question
Which of the following ports are used with TACACS?
answer
49
question
Which type of device is required to implement port authentication through a switch?
answer
RADIUS server
question
Which of the following are characteristics of TACACS+?
answer
Allows for a possible of three different servers, one each for authentication, authorizations, and accounting. It also uses TCP
question
You are troubleshooting physical layer issues with the Gi0/1 interface in a router. You need to view and analyze the number of collisions detected on the interface.
answer
show interfaces gi0/1
question
You are troubleshooting physical layer issues with the Gi0/1 interface in a router. You suspect that a duplex mismatch error has occurred, and you need to determine the duplex settings configured on the interface.
answer
show interfaces gi0/1 and show interfaces gi0/1 status
question
Review the output from the show interfaces fa0/1 command on the switch2 switch in the exhibit.
answer
a duplex mismatch exists with the device on the other end of the connection
question
Consider the network shown in the exhibit. When you run the show interfaces command on switch1, you observe a significant number of runts on the gi0/1 interface.
answer
Collisions are occurring.
question
You are reviewing the output of the show interfaces command for the gi0/1 interface on a switch. You notice a significant number of CRC errors displayed.
answer
EMI or cross talk on the cable connected to the interface and collisions
question
You are reviewing the output of the show interfaces command for the gi0/1 interface on a switch. Which interference statistic displays the number of collisions that occurred after the 64th byte of the frame was transmitted?
answer
Late collisions
question
A workstation is connected to a switch on the gi 0/2 interface using a straight through cable.
answer
The switch attempts to sense the link speed. If it can't, the slowest link speed supported on the interface is selected. If the link speed is 10 mbps or 100 mbps, half duplex is used. If the link speed is 100 mbps of faster, full duplex is used.
question
Consider the network shown in the exhibit. You have been experiencing intermittent connectivity issues with switch2. To check the status of the interfaces, you run the following commands:
answer
The device connected to the fa0/1 interface has autonegotiation disabled.
question
Your organization recently opened a branch office in a remote area. Because of its location, traditional WAN connectivity was not available, so you contracted with a satellite provider to connect the branch office network to your home office network.
answer
There is latency on the wan link
question
Your organization recently opened a branch office. You contracted with a wan service provider to connect the branch office network to your home office network. This morning, interface and protocol down
answer
The wan interface on one or both routers has been disabled and there is a problem with the service provider's network
question
Your organization recently opened a branch office. You contracted with a wan service provider to connect the branch office network to your home office network. This morning interface up and protocol down
answer
There is a data link encapsulation protocol mismatch between the wan interfaces on both ends of the link
question
Your organization recently opened a branch office. You contracted with a wan service provider to connect the branch office network to your home office network. This morning interface up and protocol up
answer
There is an ip address misconfiguration issue between the wan interfaces on both ends of the link
