A.ICMP消息
B.Traceroute
C.DOS TCP SYN
D.DOS smurf
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A.Addresses are allocated after a negotiation between the server and the host to determine the length ofthe agreement.
B.Addresses are assigned for a fixed period of time.At the end of period,a newquest for an address mustbe made ,and another address is then assigned.
C.Addresses are leased to host.A host will usually keep the same address by periodicallycontacting theDHCP sever to renew the lease.
D.Addresses are permanently assigned so that the host uses the same address at all times.
A.spanning-tree backbonefast
B.spanning-tree uplinkfast
C.spanning-tree portfast
D.spanning-tree cost512
A.拒絕服務器攻擊
B.IP地址欺騙
C.DOS TCP SYN攻擊
D.DOS smurf攻擊
A.802.3ad
B.802.1w
C.802.1Q
D.802.1d
A.每個用戶的挑戰(zhàn)驗證機制
B.簡化路由器對ACL的處理
C.降低網(wǎng)絡黑客對網(wǎng)絡的攻擊機會
D.在不損害其他安全配置的前提下,可以動態(tài)的讓用戶穿越防火墻
A.data integrity
B.encryption
C.key exchange
D.authentication
A.ping
B.tracert
C.ipconfig
D.show ip route
E.winipcfg
F.show interfaces
A.show secure
B.show file systems
C.show flash
D.show version
A.nly passwords configured after the command has been entered will be encrypted.
B.Only the enable password will be encrypted.
C.Only the enable secret password will be encrypted
D.It will encrypt the secret password and remove the enable secret password from the configuration.
E.It will encrypt all current and future passwords.
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
最新試題
請參見圖示。在網(wǎng)絡中,PC1向PC2發(fā)送了一條消息。PC2收到的幀如圖所示。該幀中的哪一信息確定了正確的目的應用程序?()
請參見圖示。已啟用路由器的NAT 功能供PC 訪問Internet??梢詾槁酚善鹘涌赟0/0/0分配下列哪一個IP 地址?()
下列哪些是私有IP 地址的地址范圍?()
請參見圖示。公司路由器由于故障被更換。更換路由器之后,Education 辦公室內(nèi)的主機C 和D 能夠相互ping 通,但是無法訪問Accounts 辦公室內(nèi)的主機。此問題的原因可能是什么?()
在配置路由器時,網(wǎng)絡技術(shù)人員想要命名路由器。輸入hostname 命令后,技術(shù)人員會看到下列哪一項提示?()
請參見圖示。哪種邏輯拓撲是對圖示網(wǎng)絡的準確描述?()
路由器使用哪一項信息來確定源主機和目的主機之間的路徑?()
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請參見圖示。RouterB 已經(jīng)過正確配置。RouterA 的以太網(wǎng)接口Fa0/0已使用如圖所示的命令進行配置。但是,從RouterA 的Fa0/0接口無法成功ping 通RouterB 的Fa0/0接口。應在RouterA 上采取什么措施來解決此問題?()
以下哪兩種介質(zhì)可提供高達1Gb/s 的帶寬?()