單項選擇題Which command encrypts all plaintext passwords?()

A.Router(config)#password-encryption
B.Router(config)#service password-encryption
C.Router#service password-encryption
D.Router# password-encryption


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1.多項選擇題哪兩個命令可以用來驗證給定的Cisco交換機的中繼鏈路的狀態(tài)?()

A. show interfaces interface
B. show interfaces trunk
C. show interfaces switchport
D. show ip interface brief
E. show interfaces vlan

2.多項選擇題Which can be done to secure the virtual terminal interfaces on a router?()

A.Administratively shut down the interfaces.
B.Physically secure the interfaces.
C.Configure a virtual terminal password and login process.
D.Enter an access list and apply it to the terminal interfaces using the access-class command.
E.Create an access list and apply it to the terminal interfaces using the access-group command

3.多項選擇題Which two statements about using the CHAP authentication mechanism in a PPP link are true?()

A.CHAP uses a two-way handshake
B.CHAP authentication periodically occurs after link establishment
C.CHAP has no protection from playback attacks
D.CHAP authentication is performed only upon link establishment
E.CHAP uses a three-way handshake
F.CHAP authentication passwords are sent in plaintext

4.單項選擇題哪命令可以從PC被用來驗證同一局域網(wǎng)交換機連接的主機之間的連接?()

A.ping address
B.tracert address
C.traceroute address
D.arp address

5.多項選擇題端口是哪兩種狀態(tài)是時,RSTP收斂?()

A.阻塞
B.學習
C.丟棄
D.轉發(fā)
E.偵聽

6.多項選擇題在以太網(wǎng)網(wǎng)絡,在什么情況下可以兩種設備可以傳輸?()

A.當他們收到一個特殊的記號
B.當有載波
C.當他們沒有檢測到其他設備發(fā)送
D.當介質是空閑
E.當服務器授予訪問權限

7.多項選擇題通過創(chuàng)建VLAN是提供了哪兩個好處?()

A.增加安全性
B.專用帶寬
C.提供分割
D.允許交換機子接口間路由通信
E.包含沖突

8.多項選擇題下列哪項是VLAN的好處?()

A.增加沖突域的大小
B.允許邏輯劃分網(wǎng)段
C.增強網(wǎng)絡安全
D.當減少沖突域時增加廣播域的大小
E.減少廣播域的大小時增加了廣播域個數(shù)
F.簡化交換機管理

9.單項選擇題

哪種說法是正確的?()

A.該的Fa0/11的角色確認SwitchA的是VLAN20根橋
B.VLAN20所運行的是VLAN生成樹協(xié)議
C.根網(wǎng)橋的MAC地址是0017.596d.1580
D.SwitchA的不是根橋,因為不是所有的接口角色被指定