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

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


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1.单项选择题A router receives information about network 192.168.10.0/24 from multiple sources. What will the router consider the most reliable information about the path to that network?()

A.a directly connected interface with an address of 192.168.10.254/24
B.a static route to network 192.168.10.0/24
C.a RIP update for network 192.168.10.0/24
D.an OSPF update for network 192.168.0.0/16
E.a default route with a next hop address of 192.168.10.1
F.a static route to network 192.168.10.0/24 with a local serial interface configured as the next hop

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

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.

3.多项选择题Which of the following statements are true regarding bridges and switches? (Choose 3.)()

A.Switches are primarily software based while bridges are hardware based.
B.Both bridges and switches forward Layer 2 broadcasts.
C.Bridges are frequently faster than switches.
D.Switches have a higher number of ports than most bridges.
E.Bridges define broadcast domains while switches define collision domains.
F.Both bridges and switches make forwarding decisions based on Layer 2 addresses.

4.多项选择题Which of the following describe private IP addresses? (Choose two.)()

A.addresses chosen by a company to communicate with the Internet
B.addresses that cannot be routed through the public Internet
C.addresses that can be routed through the public Internet
D.a scheme to conserve public addresses
E.addresses licensed to enterprises or ISPs by an Internet registry organization

5.单项选择题In which circumstance are multiple copies of the same unicast frame likely to be transmitted in a switched LAN?()

A.during high traffic periods
B.after broken links are re-established
C.when upper-layer protocols require high reliability
D.in an improperly implemented redundant topology
E.when a dual ring topology is in use

6.单项选择题There are no boot system commands in a router configuration in NVRAM. What is the fallback sequence that the router will use to find an IOS during reload?()

A.TFTP server, Flash, NVRAM
B.ROM, NVRAM, TFTP server
C.NVRAM, TFTP server, ROM
D.Flash, TFTP server, ROM
E.Flash, NVRAM, ROM

7.多项选择题What are some of the advantages of using a router to segment the network? (Choose two.)()

A.Filtering can occur based on Layer 3 information.
B.Broadcasts are eliminated.
C.Routers generally cost less than switches.
D.Broadcasts are not forwarded across the router.
E.Adding a router to the network decreases latency.

8.单项选择题An administrator issues the command ping 127.0.0.1 from the command line prompt on a PC. If a reply is received, what does this confirm?()

A.The PC has connectivity with a local host.
B.The PC has connectivity with a Layer 3 device.
C.The PC has a default gateway correctly configured.
D.The PC has connectivity up to Layer 5 of the OSI model.
E.The PC has the TCP/IP protocol stack correctly installed.

9.单项选择题What is the function of the Cisco IOS command ip nat inside source static 10.1.1.5 172.35.16.5?()

A.It creates a global address pool for all outside NAT transactions.
B.It establishes a dynamic address pool for an inside static address.
C.It creates dynamic source translations for all inside local PAT transactions.
D.It creates a one-to-one mapping between an inside local address and an inside global address.
E.It maps one inside source address to a range of outside global addresses.

10.多项选择题What can a network administrator utilize by using PPP Layer 2 encapsulation? (Choose three.)()

A.VLAN support
B.compression
C.authentication
D.sliding windows
E.multilink support
F.quality of service

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