單項選擇題

A host is attempting to send data to another host on a different network. What is the first action that the sending host will take?（）

A.Drop the data.
B.Send the data frames to the default gateway.
C.Create an ARP request to get a MAC address for the receiving host.
D.Send a TCP SYN and wait for the SYN ACK with the IP address of the receiving host.

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單項選擇題

Refer to the exhibit.The Lakside Company has the internetwork in the exhibit.The administrator would liketo reduce the size of routing table on the Central router.Which partial routing table entry in the Central routerepresents a route summary that represents the vlans in Phoenix but no additional subnets？（）

A.10.0.0.0/22 is subnetted，1 subnets D 10.4.0.0[90/20514560] via 10.2.0.2，6w0d，serial0/1
B.10.0.0.0/28 is subnetted，1 subnets D 10.2.0.0[90/20514560] via 10.2.0.2，6w0d，serial0/1
C.10.0.0.0/22 is subnetted，1 subnets D 10.0.0.0[90/20514560] via 10.2.0.2，6w0d，serial0/1
D.10.0.0.0/30 is subnetted，1 subnets D 10.2.2.0[90/20514560] via 10.2.0.2，6w0d，serial0/1
E.10.0.0.0/28 is subnetted，1 subnets D 10.4.4.0[90/20514560] via 10.2.0.2，6w0d，serial0/1
F.10.0.0.0/30 is subnetted，1 subnets D 10.4.4.4[90/20514560] via 10.2.0.2，6w0d，serial0/1

多項選擇題

A single 802.11g access point has been configured and installed in the center of a square officE.A few wireless users are experiencing slow performance and drops while most users are operating at peak efficiency. What are three likely causes of this problem? （）

A.mismatched TKIP encryption
B.null SSID
C.cordless phones
D.mismatched SSID
E.metal file cabinets
F.antenna type or direction