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Cisco 3 Chapter 7

QuestionAnswer
Why are Network Control Protocols used in PPP? to allow multiple Layer 3 protocols to operate over the same physical link
What is the data transmission rate for the DS0 standard? • 64 kb/s
In which two layers of the OSI model are key differences found between a LAN and a WAN. (Choose two.) Layer 1 • Layer 2
Which statement is true about the Cisco implementation of the HDLC protocol? It is the default encapsulation for serial interfaces on Cisco routers
Refer to the exhibit. A network administrator has a connectivity problem between the serial interfaces of Merida and Vargas. What is the cause of the problem? The encapsulation is misconfigured.
Refer to the exhibit. What statement is true about the exhibited output LCP and NCP negotiation is complete, and the data link service is available to carry packets
Which three statements are true regarding LCP? (Choose three.) It is responsible for negotiating link establishment. It terminates the link upon user request or the expiration of an inactivity timer. • It can test the link to determine if link quality is sufficient to bring up the link.
Why are Frame Relay paths referred to as virtual? • The physical circuits inside the Frame Relay cloud do not contain exclusive links for a specific Frame Relay connection
What best describes the use of a data-link connection identifier (DLCI)? an address identifying a virtual circuit
What two services allow the router to dynamically map data link layer addresses to network layer addresses Frame Relay network? (Choose two.) Inverse ARP • LMI status messages
Which three statements describe functions of the Point-to-Point Protocol with regards to the OSI model?(Choose three.) provides a mechanism to multiplex several network layer protocols • can be configured on both synchronous and asynchronous serial interfaces --uses the data link layer to configure such options as error detection and compression
At what physical location does the responsibility for a WAN connection change from the user to the service provider? demarcation point
What does a Frame Relay switch use to inform the sender that there is congestion? BECN
Refer to the exhibit. What statement is true about the debug output? The routers have different CHAP passwords configured
Which two statements describe the function of time-division multiplexing? (Choose two.) Multiple data streams share one common channel. --Time slots go unused if a sender has nothing to transmit
When customers use credit cards to make purchases at a small business, a modem is heard dialing a telephone number to transfer the transaction data to the central office. What type of WAN serial connection is in use circuit switched
Which best describes data communications equipment (DCE)? equipment that forwards data and is responsible for the clocking signal
Permanent virtual circuits and switched virtual circuits are both part of which option for WAN connectivity? packet switching
Which field of a frame uses error detection mechanisms to verify that the frame is not damaged intransit? FCS
What occurs in the encapsulation process as a data packet moves from a LAN across a WAN? The Layer 2 encapsulation changes to a format that is appropriate for the WAN technology
Refer to the exhibit. The network administrator is configuring R1 to connect to R2, which is a non-Cisco router. Which encapsulation method will need to be configured for communication to occur? PPP
A company is implementing dialup services for remote workers to connect to the local network. The company uses multiple Layer 3 protocols and requires authentication for security. Which protocol should be used for this remote access? PPP
Which two options can LCP negotiate? (Choose two.) compression • authentication
What statement best describes cell switching? • It creates fixed-length packets that traverse virtual circuits
Why are Network Control Protocols used in PPP? to allow multiple Layer 3 protocols to operate over the same physical link
What is the data transmission rate for the DS0 standard? • 64 kb/s
In which two layers of the OSI model are key differences found between a LAN and a WAN. (Choose two.) Layer 1 • Layer 2
Which statement is true about the Cisco implementation of the HDLC protocol? It is the default encapsulation for serial interfaces on Cisco routers
Refer to the exhibit. A network administrator has a connectivity problem between the serial interfaces of Merida and Vargas. What is the cause of the problem? The encapsulation is misconfigured.
Refer to the exhibit. What statement is true about the exhibited output LCP and NCP negotiation is complete, and the data link service is available to carry packets
Which three statements are true regarding LCP? (Choose three.) It is responsible for negotiating link establishment. It terminates the link upon user request or the expiration of an inactivity timer. • It can test the link to determine if link quality is sufficient to bring up the link.
Why are Frame Relay paths referred to as virtual? • The physical circuits inside the Frame Relay cloud do not contain exclusive links for a specific Frame Relay connection
What best describes the use of a data-link connection identifier (DLCI)? an address identifying a virtual circuit
What two services allow the router to dynamically map data link layer addresses to network layer addresses Frame Relay network? (Choose two.) Inverse ARP • LMI status messages
Which three statements describe functions of the Point-to-Point Protocol with regards to the OSI model?(Choose three.) provides a mechanism to multiplex several network layer protocols • can be configured on both synchronous and asynchronous serial interfaces --uses the data link layer to configure such options as error detection and compression
At what physical location does the responsibility for a WAN connection change from the user to the service provider? demarcation point
What does a Frame Relay switch use to inform the sender that there is congestion? BECN
Refer to the exhibit. What statement is true about the debug output? The routers have different CHAP passwords configured
Which two statements describe the function of time-division multiplexing? (Choose two.) Multiple data streams share one common channel. --Time slots go unused if a sender has nothing to transmit
When customers use credit cards to make purchases at a small business, a modem is heard dialing a telephone number to transfer the transaction data to the central office. What type of WAN serial connection is in use circuit switched
Which best describes data communications equipment (DCE)? equipment that forwards data and is responsible for the clocking signal
Permanent virtual circuits and switched virtual circuits are both part of which option for WAN connectivity? packet switching
Which field of a frame uses error detection mechanisms to verify that the frame is not damaged intransit? FCS
What occurs in the encapsulation process as a data packet moves from a LAN across a WAN? The Layer 2 encapsulation changes to a format that is appropriate for the WAN technology
Refer to the exhibit. The network administrator is configuring R1 to connect to R2, which is a non-Cisco router. Which encapsulation method will need to be configured for communication to occur? PPP
A company is implementing dialup services for remote workers to connect to the local network. The company uses multiple Layer 3 protocols and requires authentication for security. Which protocol should be used for this remote access? PPP
Which two options can LCP negotiate? (Choose two.) compression • authentication
What statement best describes cell switching? • It creates fixed-length packets that traverse virtual circuits
Created by: paulysa
 

 



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