Which two values are...

多项选择题Which two values are used by Spanning Tree Protocol to elect a root bridge? (Choose two.)（）。

A.amount of RAM
B.bridge priority
C.IOS version
D.IP address
E.MAC address
F.speed of the links

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1.单项选择题In the implementation of VLSM techniques on a network using a single Class C IP address, which subnet mask is the most efficient for point-to-point serial links? （）

A.255.255.255.0
B.255.255.255.240
C.255.255.255.248
D.255.255.255.252
E.255.255.255.254

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2.单项选择题Which routing protocol by default uses bandwidth and delay as metrics?（）

A.RIP
B.BGP
C.OSPF
D.EIGRP

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3.多项选择题A company is installing IP phones. The phones and office computers connect to the same device. To ensure maximum throughput for the phone data, the company needs to make sure that the phone traffic is on a different network from that of the office computer data traffic. What is the best network device to which to directly connect the phones and computers, and what technology should be implemented on this device? (Choose two.)（）

A.hub
B.router
C.switch
D.STP
E.subinterfaces
F.VLAN

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4.单项选择题A network interface port has collision detection and carrier sensing enabled on a shared twisted pair network. From this statement, what is known about the network interface port?（）

A.This is a 10 Mb/s switch port.
B.This is a 100 Mb/s switch port.
C.This is an Ethernet port operating at half duplex.
D.This is an Ethernet port operating at full duplex.
E.This is a port on a network interface card in a PC

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5.单项选择题Which spread spectrum technology does the 802.11b standard define for operation?（）

A.IR
B.DSSS
C.FHSS
D.DSSS and FHSS
E.IR, FHSS, and DSSS

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6.多项选择题What are two security appliances that can be installed in a network? (Choose two.)（）

A.ATM
B.IDS
C.IOS
D.IOX
E.IPS
F.SDM

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7.多项选择题What are two recommended ways of protecting network device configuration files from outside network security threats? (Choose two.)（）

A.Allow unrestricted access to the console or VTY ports.
B.Use a firewall to restrict access from the outside to the network devices.
C.Always use Telnet to access the device command line because its data is automatically encrypted.
D.Use SSH or another encrypted and authenticated transport to access device configurations.
E.Prevent the loss of passwords by disabling password encryption.

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8.单项选择题For security reasons, the network administrator needs to prevent pings into the corporate networks from hosts outside the internetwork. Which protocol should be blocked with access control lists？（）

A.IP
B.ICMP
C.TCP
D.UDP

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9.多项选择题Which of the following are associated with the application layer of the OSI model？（two.）（）

A.ping
B.Telnet
C.FTP
D.TCP
E.IP

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10.单项选择题Which type of attack is characterized by a flood of packets that are requesting a TCP connection to a server？（）

A.denial of service
B.brute force
C.reconnaissance
D.Trojan horse

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