單項(xiàng)選擇題At which layer of the OSI model is RSTP used to prevent loops?()

A.data link
B.network
C.physical
D.transport


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2.多項(xiàng)選擇題Which three IP addresses can be assigned to hosts if the subnet mask is /27 and subnet zero is usable?()

A. 10.15.32.17
B. 17.15.66.128
C. 66.55.128.1
D. 135.1.64.34
E. 129.33.192.192
F. 192.168.5.63

3.多項(xiàng)選擇題The network administrator has been asked to give reasons for moving from ipv4 to ipv6. what are two validreasons for adopting ipv6 over ipv4?()

A.telnet access does not require a password
B.nat
C.no broadcast
D.chanage of destination address in the ipv6 header
E.chanage of source address in the ipv6 header
F.autoconfiguration

4.單項(xiàng)選擇題The network administrator has discovered that the power supply has failed on a switch in the company LAN and that the switch has stopped functioning. It has been replaced with a Cisco Catalyst 2950 series switch. What must be done to ensure that this new switch becomes the root bridge on the network?()

A. Lower the bridge priority number.
B. Change the MAC address of the switch.
C. Increase the VTP revision number for the domain.
D. Lower the root path cost on the switch ports.
E. Assign the switch an IP address with the lowest value.

5.單項(xiàng)選擇題which command allows you to verify the encapsulation type (CISCO OR IETF) for a frame relay link?()

A.show frame-relay map
B.show frame-relay lmi
C.show inter serial
D.show frame-relay pvc

7.單項(xiàng)選擇題What is the alternative notation for the IPV6 address B514:82C3:0000:0000:0029:EC7A:0000:EC72?()

A.B514:82C3:0029::EC7A:0000:EC72
B.B514:82C3:0029:EC7A:EC72
C.B514:82C3::0029:EC7A:0:EC72
D.B514:82C3::0029:EC7A:EC72

8.單項(xiàng)選擇題

The Frame Relay network in the diagram is not functioning properly. What is the cause of the problem?()

A.The Gallant router has the wrong LMI type configured
B.Inverse ARP is providing the wrong PVC information to the Gallant router
C.The S3 interface of the Steele router has been configured with the frame-relay encapsulation ietf command
D.The frame-relay map statement in the Attalla router for the PVC to Steele is not correct
E.The IP address on the serial interface of the Attalla router is configured incorrectly

9.單項(xiàng)選擇題How should a router that is being used in a Frame Relay network be configured to avoid split horizon issues from preventing routing updates?()

A.Configure a separate sub-interface for each PVC with a unique DLCI and subnet assigned to the subinterface B
B.Configure each Frame Relay circuit as a point-to-point line to support multicast and broadcast traffic
C.Configure many sub-interfaces on the same subnet
D.Configure a single sub-interface to establish multiple PVC connections to multiple remote router interfaces

10.多項(xiàng)選擇題Which of the following are types of flow control?()

A. buffering
B. cut-through
C. windowing
D. congestion avoidance
E. load balancing

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