多項選擇題In an Ethernet network, under what two scenarios can devices transmit? ()

A.when they receive a special token
B.when there is a carrier
C.when they detect no other devices are sending
D.when the medium is idle
E.when the server grants access


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1.多項選擇題以下那些是安全審計工具()

A.思科一步鎖閉
B.安全審計向?qū)?br /> C.思科自動安全
D.一鍵關(guān)閉

2.單項選擇題What is the first 24 bits in a MAC address called?()

A.NIC
B.BIA
C.OUI
D.VAI

3.多項選擇題為了獲得更好的虛擬登錄連接的安全性,應(yīng)配置以下哪些參數(shù)()

A.兩次成功登錄之間的延遲
B.如果檢測到DoS攻擊,應(yīng)關(guān)閉登錄
C.加密所有密碼
D.為登錄建立系統(tǒng)日志

5.單項選擇題When is it necessary to use a public IP address on a routing interface?()

A.Connect a router on a local network.
B.Connect a router to another router.
C.Allow distribution of routes between networks.
D.Translate a private IP address.
E.Connect a network to the Internet.

7.單項選擇題What will happen if a private IP address is assigned to a public interface connected to an ISP?()

A.Addresses in a private range will be not routed on the Internet backbone.
B.Only the ISP router will have the capability to access the public network.
C.The NAT process will be used to translate this address in a valid IP address.
D.Several automated methods will be necessary on the private network.
E.A conflict of IP addresses happens, because other public routers can use the same range.

8.多項選擇題提高密碼的安全性,應(yīng)進行如下配置()

A.設(shè)置最短密碼長度
B.關(guān)閉無用連接
C.加密配置文件中的所有密碼
D.設(shè)置密碼有效期

9.單項選擇題Host 1 sends a request for a file to remote sever1. Which destination address does Host 1 place f the packet containing the request()。

A.The Mac address of the NIC in Sever1
B.The IP address of Server 1.
C.The MAC address of the s0/0/0 interface of router R2
D.The IP address of the s0/0/0 interface of router R1
E.The IP address of the Fa0/0 interface of router R1

10.多項選擇題Which two commands correctly verify whether port security has been configured on portFastEthernet 0/12on a switch?()

A.SW1#show swithport port-security interface FastEthernet 0/12
B.SW1# show swithport port-secure interface FastEthernet 0/12
C.SW1# show port-secure interface FastEthernet 0/12
D.SW1#show running-config

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