A.link bandwidth
B.hop count
C.link cost
D.administrative distance
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A.配置不當,防火墻會引起嚴重問題
B.很多應(yīng)用不能安全通過防火墻
C.用戶可能會積極尋找繞過防火期接收被阻信息的方法,使網(wǎng)絡(luò)遭受潛在攻擊的危險
D.未授權(quán)的流量可能經(jīng)隧道或隱藏在合法的流量中通過防火墻
A.SMTP
B.Telnet
C.FTP
D.DNS
A.The command is accepted and the respective VLAN is added to vlan dat.
B.The command is rejected.
C.The command is accepted and you must configure the VLAN manually.
D.The port turns amber.
A.防止敏感用戶和應(yīng)用暴露于不受信任的用戶前
B.網(wǎng)絡(luò)性能提升
C.凈化協(xié)議流量,防止暴露協(xié)議漏洞
D.正確的配置防火墻后,使得安全策略的實現(xiàn)更簡單、可擴展、更健壯
A.RIP is an example of distance vector routing protocols.
B.Updates are periodic and include the entire routing table.
C.Routing updates are sent only after topology changes
D.The protocol can be useful in hub-and-spoke and hierarchical networks.
E.Convergence is usually faster than with link state protocols
F.Each router has its own view of the topology
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
A.ICMP消息
B.Traceroute
C.DOS TCP SYN
D.DOS smurf
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(wù)器攻擊
B.IP地址欺騙
C.DOS TCP SYN攻擊
D.DOS smurf攻擊
最新試題
何時必須使用clock rate 命令配置路由器串行接口?()
OSI 模型的哪兩項功能在第2層實現(xiàn)?()
請參見圖示。對于從主機A 向Web 服務(wù)器發(fā)出的網(wǎng)頁請求,正確的目的套接字數(shù)字是什么?()
以下哪兩種介質(zhì)可提供高達1Gb/s 的帶寬?()
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?()
請參見圖示。主機B 嘗試與主機C 建立TCP/IP 會話。在嘗試期間,San Francisco 器由器的FastEthernet 接口fa0/1捕獲到一個幀。捕獲的幀中包含源IP 地址為10.10.1.2而目的IP 地址為10.31.1.20的數(shù)據(jù)包。捕獲該幀時,它的目的MAC 地址是什么?()
請參見圖示。下列哪組設(shè)備僅包含中間設(shè)備?()
請參見圖示。主機A 和B 無法互相通信。此問題的原因是什么?()
請參見圖示。主機A 嘗試與主機C 建立TCP/IP 會話。在嘗試期間,路由器Y 的FastEthernet 接口fa0/1捕獲到一個幀。捕獲的幀中包含源IP 地址為172.16.1.5而目的IP 地址為172.16.7.24的數(shù)據(jù)包。捕獲該幀時,它的源MAC 地址是什么?()
請參見圖示。在網(wǎng)絡(luò)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(yīng)用程序?()