24.
Which of the following describes the PAP protocol? (Choose two.) | |
sends unencrypted authentication passwords | |
performs a three-way handshake | |
allows repeated login attempts | |
uses the remote router hostname to verify identity | |
sends a random challenge throughout the session |
What does the command debug isdn q921 display? | |
exchange of call setup and teardown messages | |
PAP and CHAP authentication traffic | |
Layer 2 messages on the D channel | |
protocol errors and statistics | |
Layer 2 messages on the B channel |
Which of the following are supported by a BRI interface on a router? (Choose two.) | |
Two independent channels that can carry analog data with a bandwidth of 64 KHz. | |
A single 128 Kbps digital bearer channel. | |
Two multiplexed channels carrying digital data. | |
A single 64 Kbps signaling channel. | |
A multiplexed data channel that can only handle SS7 information. | |
A 16 Kbps delta channel used for signaling purposes. |
How many separate B channel circuits can be provisioned on a PRI interface that uses a T1 line for connectivity? | |
2 | |
16 | |
23 | |
24 | |
30 | |
128 |
What does a DLCI of 0 indicate about a frame? (Choose two.) | |
This is the first data frame sent by the router. | |
This is a management frame. | |
The encapsulation type is Cisco. | |
The encapsulation type is IETF. | |
The LMI type is Ansi or q933a. | |
The LMI type is Cisco. |
Which of the following are functions of the Local Management Interface used in Frame Relay networks? (Choose three.) | |
exchange information about the status of virtual circuits | |
map DLCIs to network addresses | |
provide flow control | |
provide error notification | |
provide congestion notification | |
send keepalive packets to verify operation of the PVC |
Which commands can be used to identify which DLCIs are active? (Choose two.) | |
show frame-relay map | |
show frame-relay lmi | |
show frame-relay pvc | |
show frame-relay interface | |
show interfaces | |
show ip route |
Which of the following statements are true about Frame Relay? (Choose three.) | |
Frame Relay operation is defined by a series of ISO standards. | |
Frame Relay is a packet switched, connection-oriented, wide area network service. | |
Frame Relay only supports point-to-point connections. | |
A router can be considered as data terminal equipment (DTE) in a frame relay system. | |
Frame Relay is a cell switched, connection-oriented, wide area network service. | |
Frame Relay networks use a subset of the HDLC protocol to carry information. |
Which of the following statements regarding point-to-point subinterfaces are true? (Choose two.) | |
A point-to-point subinterface on one router must be connected to a similar subinterface on a remote router. | |
Each point-to-point subinterface connection is configured with its own subnet. | |
The DLCIs configured on the remote and local routers must be the same for the PVC. | |
LMI frames are not transmitted through a subinterface. | |
Routing updates in point-to-point networks are not subject to the split-horizon rule. |
![]() Which of the following can be concluded from the router output displayed in the graphic? (Choose two.) | |
The local DLCI number of this PVC is 100. | |
The interface has been configured for subinterfaces and this map is for subinterface 0. | |
Inverse ARP has determined the remote ip address as 10.140.1.1. | |
The LMI type is ANSI (0x64). | |
There is currently no congestion on the link. |
Why would data frames be discarded in a Frame Relay network? (Choose two.) | |
The frame contains an incorrect IP address. | |
An error has been detected in computing the frame check sequence. | |
There is not enough bandwidth dedicated for the data contained in the frame. | |
Data is transmitted at a rate greater than the access speed. | |
The frame contains an incorrect DLCI. |
Which of the following describe functions of the Point-to-Point protocol with regards to the OSI model? (Choose three.) | |
PPP uses Layer 3 of the OSI model to establish and maintain a session between devices. | |
PPP operates at all layers of the OSI model. | |
PPP uses the data link layer to configure such options as error detection and compression. | |
PPP provides a mechanism to multiplex several network layer protocols. | |
PPP uses Network Control Protocols (NCP) to test and maintain connectivity between devices. | |
PPP can be configured on both synchronous and asynchronous serial interfaces. |
What are three features of the CHAP protocol? (Choose three.) | |
exchanges a random challenge number during the session to verify identity | |
sends authentication password to verify identity | |
prevents transmission of login information in plain text | |
disconnects the PPP session if authentication fails | |
initiates a two-way handshake |
Which of the following protocols can be used to encapsulate data traffic sent from a router BRI interface? (Choose two.) | |
Link Access Protocol - Data | |
High-Level Data Link Control | |
Logical Link Control | |
Serial Data Link Control | |
Point to Point protocol | |
Binary Synchronous Control protocol |
How does Frame Relay technology process frames that contain errors? (Choose two.) | |
Frame Relay services depend on the upper layer protocols to handle error recovery. | |
It requires the receiving device to request that the sender retransmit erroneous frames. | |
FECN, BECN, and DE bits are set in the frames to minimize errors. | |
The receiving device drops any frames that contain errors without notifying the sender. | |
The frame relay switch notifies the sender that errors were detected. |
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