單項(xiàng)選擇題ISDN的物理線路是()。

A.2B+D
B.30B+D
C.同軸電纜
D.普通電纜


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1.單項(xiàng)選擇題下列哪一條命令用于配置DCC的鏈路處于斷開(kāi)狀態(tài)后,重新建立鏈接等待的時(shí)間?()

A.dialer time ridle
B.dialer time rcompete
C.dialer time renable
D.dialer time rwait-carrier

2.單項(xiàng)選擇題A network administrator must configure 200 switch ports to accept traffic from only the currently attached host devices. What would be the most efficient way to configure MAC-level security on all these ports?()

A.Visually verify the MAC addresses and then telnet to the switches to enter the switchport-port security mac-address command
B.Have end users e-mail their MAC addresses. Telnet to the switch to enter the switchport-port security mac-address command
C.Use the switchport port-security MAC address sticky command on all the switch ports that have end devices connected to them
D.Use show mac-address-table to determine the addresses that are associated with each port and then enter the commands on each switch for MAC address port-security

3.單項(xiàng)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

4.單項(xiàng)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

5.單項(xiàng)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

7.單項(xiàng)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

8.單項(xiàng)選擇題配置備份中心的目的是()。

A.增加網(wǎng)絡(luò)帶寬
B.提高網(wǎng)絡(luò)可用性
C.降低網(wǎng)絡(luò)傳輸費(fèi)用
D.防止數(shù)據(jù)傳輸意外中止

9.多項(xiàng)選擇題路由器作為網(wǎng)絡(luò)互連設(shè)備,必須具備以下哪些特點(diǎn)?()

A.支持路由協(xié)議
B.至少具備一個(gè)備份口
C.到少支持兩個(gè)網(wǎng)絡(luò)接口
D.協(xié)議至少要實(shí)現(xiàn)到網(wǎng)絡(luò)層
E.具有存儲(chǔ)、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

10.多項(xiàng)選擇題關(guān)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

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