單項選擇題Which type of attack is characterized by a flood of packets that are requesting a TCP connection to a server()。

A.denial of service
B.brute force
C.reconnaissance
D.Trojan horse


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1.單項選擇題V.24接口工作在同步方式下最高傳輸速率是()。

A.64000 bps
B.115200 bps
C.2048000 bps
D.4096000 bps

2.單項選擇題The network administrator is asked to configure 113 point-to-point links. Which IP addressing scheme best defines the address range and subnet mask that meet the requirement and waste the fewest subnet and host addresses?()

A.10.10.0.0/18 subnetted with mask 255.255.255.252
B.10.10.0.0/25 subnetted with mask 255.255.255.252
C.10.10.0.0/24 subnetted with mask 255.255.255.252
D.10.10.0.0/23 subnetted with mask 255.255.255.252
E.10.10.0.0/16 subnetted with mask 255.255.255.252

4.單項選擇題What is the difference between a CSU/DSU and a modem?()

A.A CSU/DSU converts analog signals from a router to a leased line; a modem converts analog signals from a router to a leased line
B.A CSU/DSU converts analog signals from a router to a phone line; a modem converts digital signals from a router to a leased line
C.A CSU/DSU converts digital signals from a router to a phone line; a modem converts analog signals from a router to a phone line
D.A CSU/DSU converts digital signals from a router to a leased line; a modem converts digital signals from a router to a phone line

5.單項選擇題配置備份中心的目的是()。

A.增加網(wǎng)絡帶寬
B.提高網(wǎng)絡可用性
C.降低網(wǎng)絡傳輸費用
D.防止數(shù)據(jù)傳輸意外中止

6.多項選擇題路由器作為網(wǎng)絡互連設備,必須具備以下哪些特點?()

A.支持路由協(xié)議
B.至少具備一個備份口
C.到少支持兩個網(wǎng)絡接口
D.協(xié)議至少要實現(xiàn)到網(wǎng)絡層
E.具有存儲、轉(zhuǎn)發(fā)和尋徑功能
F.至少支持兩種以上的子網(wǎng)協(xié)議

7.多項選擇題關于MAC地址表示正確的是()。

A.00-e0-fe-01-23-45
B.00e0.fe01.2345
C.00e.0fe.-012.345
D.00e0.fe112345

8.單項選擇題The command frame-relay map ip 10.121.16.8 102 broadcast was entered on the router. Which of the following statements is true concerning this command()。

A.This command should be executed from the global configuration mode
B.The IP address 10.121.16.8 is the local router port used to forward data
C.102 is the remote DLCI that will receive the information
D.This command is required for all Frame Relay configurations
E.The broadcast option allows packets, such as RIP updates, to be forwarded across the PVC

9.多項選擇題Which three options are valid WAN connectivity methods? ()

A.PPP
B.WAP
C.HDLC
D.MPLS
E.L2TPv3
F.ATM

10.單項選擇題How should a router that is being used in a Frame Relay network be configured to avoid split horizon issues from preventing routing updates()。

A.Configure a separate sub-interface for each PVC with a unique DLCI and subnet assigned to the sub-interface
B.Configure each Frame Relay circuit as a point-to-point line to support multicast and broadcast traffic
C.Configure many sub-interfaces on the same subnet
D.Configure a single sub-interface to establish multiple PVC connections to multiple remote router interfaces

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