單項選擇題Given an IP address 172.16.28.252 with a subnet mask of 255.255.240.0, what is the correct network addres?()

A.172.16.16.0
B.172.16.24.0
C.172.16.0.0
D.172.16.28.0


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1.單項選擇題Which command can be used to verify the DLCI destination address in a Frame Relay static configuration?()

A.show frame-relay end-to-end
B.show frame-relay map
C.show frame-relay lmi
D.show frame-relay pvc

2.多項選擇題As a frame leaves a Layer 3 device,the Layer 2 encapsulation information is changed from what it was when it entered the device. For what two reasons can this happen?()

A.The data is moving from 10BASE-TX to 100BASE-TX.
B.The WAN encapsulation type has changed.
C.The data format has changed from analog to digital.
D.The source and destination hosts are in the same subnet.
E.The source and destination MAC addresses have changed.

6.單項選擇題Which command sets and automatically encrypts the privileged enable mode password?()

A.enbale password c1sco
B.secret enable c1sco
C.password enable c1sco
D.enable secret c1sco

8.單項選擇題Which statement is true?()

A.An IPv6 address is 64 b long and is represented as hexadecimal characters.
B.An IPv6 address is 32 b long and is represented as decimal digits.
C.An IPv6 address is 128 b long and is represented as decimal digits.
D.An IPv6 address is 128 b long and is represented as hexadecimal characters.

9.單項選擇題

When upgrading the IOS image, the network administrator receives the exhibited error messagE.What could be the cause of this error?()

A.The new IOS image is too large for the router flash memory.
B.The TFTP server is unreachable from the router.
C.The new IOS image is not correct for this router platform.
D.The IOS image on the TFTP server is corrupt.
E.There is not enough disk space on the TFTP server for the IOS image.

10.單項選擇題Which statement is true, as relates to classful or classless routing?()

A.Automatic summarization at classful boundries can cause problems on discontinuous subnets
B.EIGRP and OSPF are classful routing protocols and summarize routes by default
C.RIPv1 and OSPF are classless routing protocols
D.Classful routing protocols send the subnet mask in routing updates

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