單項選擇題R1 forwards a packet from Host 1 to remote Server 1. Which statement describes the use of a MAC as the frame carrying this packet leaves the s0/0/0 interface of R1（）。

A.The frame does not have MAC addresses.
B.The source MAC address in the frame is the MAC address of the NIC of Host 1.
C.The source MAC address in the frame is the MAC address of the s0/0/0 interface of R1.
D.The destination MAC address in the frame is the MAC address of the NICof server 1.
E.The destination MAC address in the frame is the MAC address of the s0/0/0 interface of R2


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1.單項選擇題What is known as "one-to-nearest" addressing in IPv6?（）

A.global unicast
B.anycast
C.multicast
D.unspecified address

2.單項選擇題Which type of cable is used to connect the COM port of a host to the COM port of a router or switch?（）

A.crossover
B.straight-through
C.rolled
D.shielded twisted-pair

3.單項選擇題最早的網(wǎng)絡(luò)安全工具是（）

A.ACS
B.IPS
C.IDS
D.IPSec

4.單項選擇題Which parameter or parameters are used to calculate OSPF cost in cisco routers？（）

A.Bandwidth，Delay，and MTUB
B.andwidth
C.Bandwidth and MTU
D.Bandwidth，MTU，Reliability，Delay，and Load

5.單項選擇題Which Cisco Catalyst feature automatically disables the port in an operational PortFast upon receipt of a BPDU?（）

A.BackboneFast
B.UplinkFast
C.Root Guard
D.BPDU Guard
E.BPDU Filter

6.單項選擇題Host 1 receives a file from remote server 1. Which MAC address appears as the source address in the header of the frames received by Host 1（）。

A.The MAC address of the NIC in Host 1
B.The MAC address of the NIC in server 1
C.The MAC address of the Fa0/0 interface of router R1
D.The MAC address of the s0/0/0 interface of the router R2

7.多項選擇題By default, each port in a Cisco Catalyst switch is assigned to VLAN1. Which two recommendations are key to avoid unauthorized management access? （）

A.Create an additional ACL to block the access to VLAN 1.
B.Move the management VLAN to something other than default.
C.Move all ports to another VLAN and deactivate the default VLAN.
D.Limit the access in the switch using port security configuration.
E.Use static VLAN in trunks and access ports to restrict connections.
F.Shutdown all unused ports in the Catalyst switch.

8.多項選擇題

Your boss is learning a CCNA training course，refer to the exhibit.The access list has been configured on the S0/0 interface of router RTB in the outbound direction.Which two packets，if routed to the interface，will be denied？（）
access-list 101 denytcp192.168.15.320.0.0.15any eq telnet
access-list 101 permitip any any

A.source ip address:192.168.15.5;destination port: 21
B.source ip address:,192.168.15.37 destination port: 21
C.source ip address:,192.168.15.41 destination port: 21
D.source ip address:,192.168.15.36 destination port: 23
E.source ip address:192.168.15.46;destination port: 23
F.source ip address:,192.168.15.49 destination port: 23

9.多項選擇題Host 1 has just started up and requests a web page from web server 2. Which two statements describe steps in the process Host 1 uses to send the request to web server 2 (choose two)（）。

A.Host 1 addresses the frames to the MAC address of router R1
B.Host 1 looks in its ARP cache for the MAC address of router R1
C.Host 1 addresses the frames to the MAC address of web server 2
D.Host 1 sends the packets to router R1 to be forwarded to web server 2
E.Host 1 sends a broadcast ARP request to obtain the MAC address of webserver2

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