單項選擇題Which statement describes a spanning-tree network that has converged?()

A. All switch and bridge ports are in the forwarding state.
B. All switch and bridge ports are assigned as either root or designated ports.
C. All switch and bridge ports are in either the forwarding or blocking state.
D. All switch and bridge ports are either blocking or looping.


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1.多項選擇題What are three valid reasons to assign ports on VLANs on a switch?()

A. to make VTP easier to implement
B. to isolate broadcast traffic
C. to increase the size of the collision domain
D. to allow more devices to connect to the network
E. to logically group hosts according to function
F. to increase network security

2.單項選擇題A college has a small campus where 25 faculty members are located. The faculty offices and student computers are currently on the same network. The faculty are concerned about students being able to capture packets going across the network and obtain sensitive material. What could a network administrator do to protect faculty network traffic from student connections?()

A. Install anti-virus software on the student computers.
B. Put the faculty computers in a separate VLAN.
C. Power down the switches that connect to faculty computers when they are not in use.
D. Remove the student computers from the network and put them on a peer-to-peer network.
E. Create an access list that blocks the students from the Internet where the hacking tolls are located.

3.多項選擇題Which statement describe two of the benefits of VLAN Trunking Protocol?()

A. VTP allows routing between VLANs.
B. VTP allows a single switch port to carry information to more than one VLAN.
C. VTP allows physically redundant links while preventing switching loops.
D. VTP simplifies switch administration by allowing switches to automatically share VLAN configuration information.
E. VTP helps to limit configuration errors by keeping VLAN naming consistent across the VTP domain.
F. VTP enhances security by preventing unauthorized hosts from connecting to the VTP domain.

4.多項選擇題The network security policy requires that only one host be permitted to attach dynamically to each switch interface. If that policy is violated, the interface should shut down. Which two commands must the network administrator configure on the 2950 Catalyst switch to meet this policy?()

A. TestKing1(config-if)# switchport port-security maximum 1
B. TestKing1(config)# mac-address-table secure
C. TestKing1(config)# access-list 10 permit ip host
D. TestKing1(config-if)# switchport port-security violation shutdown
E. TestKing1(config-if)# ip access-group 10

5.單項選擇題Which PPP subprotocol negotiates authentication options?()

A.NCP
B.ISDN
C.SLIP
D.LCP
E.DLCI

7.單項選擇題What is the purpose of Spanning Tree Protocol?()

A. to prevent routing loops
B. to create a default route
C. to provide multiple gateways for hosts
D. to maintain a loop-free Layer 2 network topology
E. to enhance the functions of SNMP

8.單項選擇題What is the function of the CSMA/CD algorithm in Ethernet technologies?()

A. defines how the media is accessed
B. supplies a token to determine which host has access to the media
C. defines the encoding of electrical signals on the wire
D. determines the preamble bits

9.單項選擇題What value is primarily used to determine which port becomes the root port on each non root switch in a spanning-tree topology?()

A. path cost
B. lowest port MAC address
C. VTP revision number
D. highest port priority number
E. port priority number and MAC address

10.單項選擇題What is the purpose of the OSPF router ID in a OR/BOR election?()

A. It is used with the OSPF priority values to determine which OSPF router will become the DR or BOR in a point-to-point network
B. It is used with the OSPF priority values to determine which interface will be used to form a neighbor relationship with another OSPF router
C. It is used with the OSPF priority values to determine which router will become the DR or BOR in a multi access network
D. It is used to determine which interfaces will send Hello packets to neighboring OSPF routers

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Which of the following contribute to congestion on an Ethernet network?()

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Which characteristics are representative of a link-state routing protocol?()

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What is the subnetwork address for a host with IP address 201.100.5.68/28?()

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What is the purpose of pressing the Ctrl+Break keys during the router password recover procedure?()

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Five minutes after issuing the show running-config command, a technician enters the command again and notices that several access list statements have been altered. Because of this, the technician believes that the router is being configured by an unknown person through Telnet. Before changing the router passwords, the technician would like to discover if anyone is connected to the router by Telnet and stop them from making further changes.Which commands will accomplish these options?()

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