Which of the following are VLAN frame ...

多项选择题Which of the following are VLAN frame encapsulation types that may be configured on a Catalyst switch?（）

A. VTP
B. ISL
C. CDP
D. 802.1Q
E. 802.1p
F. LLC

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1.单项选择题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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2.多项选择题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

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3.单项选择题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.

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4.多项选择题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.

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5.多项选择题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

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6.单项选择题Which PPP subprotocol negotiates authentication options?（）

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

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7.多项选择题A network administrator issues the ping 192.168.2.5 command and successfully tests connectivity to a host that has been newly connected to the network. Which protocols were used during the test?（）

A. ARP
B. CDP
C. DHCP
D. DNS
E. ICMP

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8.单项选择题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

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9.单项选择题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

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10.单项选择题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

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