Which of the following describes the r...

多项选择题Which of the following describes the roles of devices in a WAN?（）

A. A CSU/DSU terminates a digital local loop.
B. A modem terminates a digital local loop.
C. A CSU/DSU terminates an analog local loop.
D. A modem terminates an analog local loop.
E. A router is commonly considered a DTE device.
F. A router is commonly considered a DCE device.

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1.多项选择题Switch ports operating in which two roles will forward traffic according to the IEEE 802.1w standard?（）

A.alternate
B.backup
C.designated
D.disabled
E.root

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2.多项选择题Which three Layer 2 encapsulation types would be used on a WAN rather than a LAN?（）

A.HDLC
B.Ethernet
C.Token Ring
D.PPP
E.FDDI
F.Frame Relay

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3.多项选择题A Catalyst 2950 needs to be reconfigured. What steps will ensure that the old configuration is erased?（）

A. Erase flash.
B. Restart the switch.
C. Delete the VLAN database.
D. Erase the running configuration.
E. Erase the startup configuration.
F. Modify the configuration register.

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4.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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5.多项选择题What are two results of entering the Switch(config)# vtp mode client command on a Catalyst switch?（）

A. The switch will ignore VTP summary advertisements.
B. The switch will forward VTP summary advertisements.
C. The switch will process VTP summary advertisements.
D. The switch will originate VTP summary advertisements.
E. The switch will create, modify and delete VLANs for the entire VTP domain.

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6.多项选择题What are three valid reasons to assign ports to 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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7.多项选择题The network 172.25.0.0 has been divided into eight equal subnets. Which of the following IP addresses can be assigned to hosts in the third subnet if the ip subnet-zero command is configured on the router?（）

A.172.25.78.243
B.172.25.98.16
C.172.25.72.0
D.172.25.94.255
E.172.25.96.17
F.172.25.100.16

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8.多项选择题What are the possible trunking modes for a switch port?（）

A. transparent
B. auto
C. on
D. desirable
E. client
F. forwarding

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9.多项选择题What should be done prior to backing up an IOS image to a TFTP server?（）

A. Make sure that the server can be reached across the network.
B. Check that authentication for TFTP access to the server is set.
C. Assure that the network server has adequate space for the IOS image.
D. Verify file naming and path requirements.
E. Make sure that the server can store binary files.
F. Adjust the TCP window size to speed up the transfer.

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10.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. Switch1(config-if)# switchport port-security maximum 1
B. Switch1(config)# mac-address-table secure
C. Switch1(config)# access-list 10 permit ip host
D. Switch1(config-if)# switchport p ort-security violation shutdown
E. Switch1(config-if)# ip access-group 10

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