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


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1.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

2.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

3.多項選擇題端口是哪兩種狀態(tài)是時,RSTP收斂?()

A.阻塞
B.學(xué)習(xí)
C.丟棄
D.轉(zhuǎn)發(fā)
E.偵聽

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

A.當(dāng)他們收到一個特殊的記號
B.當(dāng)有載波
C.當(dāng)他們沒有檢測到其他設(shè)備發(fā)送
D.當(dāng)介質(zhì)是空閑
E.當(dāng)服務(wù)器授予訪問權(quán)限

5.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