单项选择题Users on the 192.168.1.0/24 network must access files located on the Server 1. What route could be configured on router R1 for file requests to reach the server?()

A.ip route 0.0.0.0 0.0.0.0 s0/0/0
B.ip route 0.0.0.0 0.0.0.0 209.165.200.226
C.ip route 209.165.200.0 255.255.255.0 192.168.1.250
D.ip route 192.168.1.0 255.255.255.0 209.165.100.250


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1.单项选择题Which wireless LAN design ensures that a mobile wireless client will not lose connectivity when moving from one access point to another?()

A.using adapters and access points manufactured by the same company
B.overlapping the wireless cell coverage by at least 10%
C.configuring all access points to use the same channel
D.utilizing MAC address filtering to allow the client MAC address to authenticate with the surrounding APs

2.单项选择题Which encryption type does WPA2 use?()

A.AES-CCMP
B.PPK via IV
C.PSK
D.TKIP/MIC

3.多项选择题Which are valid modes for a switch port used as a VLAN trunk? (Choose three.)()

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

4.单项选择题Which statement is true about full-duplex Ethernet in comparison to half-duplex Ethernet?()

A.Full-duplex Ethernet consists of a shared cable segment. Half-duplex Ethernet provides a point-to-point link.
B.Full-duplex Ethernet uses a loopback circuit to detect collisions. Half-duplex Ethernet uses a jam signal.
C.Full-duplex Ethernet can provide higher throughput than can half-duplex Ethernet of the same bandwidth.
D.Full-duplex Ethernet uses two wires to send and receive. Half-duplex Ethernet uses one wire to send and receive.

7.多项选择题Which of the following are types of flow control? (Choose three.)()

A.buffering
B.cut-through
C.windowing
D.congestion avoidance
E.load balancing

8.单项选择题Acknowledgements, sequencing, and flow control are characteristics of which OSI layer?()

A.Layer 2
B.Layer 3
C.Layer 4
D.Layer 5
E.Layer 6
F.Layer 7

9.单项选择题When a new trunk link is configured on an IOS based switch, which VLANs are allowed over the link?()

A.By default, all defined VLANs are allowed on the trunk.
B.Each single VLAN, or VLAN range, must be specified with the switchport mode command.
C.Each single VLAN, or VLAN range, must be specified with the vtp domain command.
D.Each single VLAN, or VLAN range, must be specified with the vlan database command.

10.单项选择题When a router is connected to a Frame Relay WAN link using a serial DTE interface, how is the interface clock rate determined?()

A.It is supplied by the CSU/DSU.
B.It is supplied by the far end router.
C.It is determined by the clock rate command.
D.It is supplied by the Layer 1 bit stream timing.

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