A.NAT protects network security because privat enetworks are not advertised.
B.NAT accelerates the routing process because no modifications are made on the packets.
C.Dynamic NAT facilitates connections from the outside of the network.
D.NAT facilitates end-to-end communication when IPsec is enable.
E.NAT eliminates the need to re-address all host that require extemal access.
F.NAT conserves addresses through host MAC-level multiplexing.
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A.to map all the devices on a network.
B.to display the current TCP/IP configuration values.
C.to see how a device MAC address is mapped to its IP address.
D.to see the path a packet will take when traveling to a specified destination.
E.to display the MTU values for each router in a specified network path from source to a destination.
A.point-to-point and multiaccess
B.point-to-multipoint and multiaccess
C.point-to-point and point-to-multipoint
D.nonbroadcast and broadcast multipoint
E.nonbroadcast and broadcast multiaccess
A.denial of service
B.brute force
C.reconnaissance
D.Trojan horse
A.access-list 50 deny 192.168.1.10.0.0.255
B.access-list 110 permit ip any any
C.access-list 2500 deny tcp any host 192.168.1.1 eq22
D.access-list 101 deny tcp any host 192.168.1.1
A.15 seconds
B.30 seconds
C.180 seconds
D.240 seconds
A.It provides dynamic neighbor discovery.
B.It detects unreachable neighbors in 90 second intervals.
C.It maintains neighbor relationships.
D.It negotiates correctness parameters between neighboring interfaces.
E.Ituses timers to elect the router with the fastest links as the designated router.
F.It broadcasts hello packets throughout the internetwork to discover all routers that are running OSPF.
A.hub
B.router
C.switch
D.STP
E.subinterfaces
F.VLAN
A.The PC has connectivity with a local host.
B.The PC has connectivity with a Layer 3 device.
C.The PC has a default gateway correctly configured
D.The PC has connectivity up to Layer 5 of the OSI model
E.The PC has the TCP/IP protocol stack correctly installed.
根據(jù)下圖顯示的拓?fù)浣Y(jié)構(gòu)和路由器配置,一個(gè)在該LAN上的主機(jī)正在通過INTERNET訪問一個(gè)FTP服務(wù)器。下列地址中哪個(gè)可以作為路由器發(fā)送到該目的服務(wù)器的數(shù)據(jù)包的源地?()
A.10.10.0.1
B.10.10.0.2
C.199.99.9.33
D.199.99.9.57
E.200.2.2.17
F.200.2.2.18
A.by encrypting all passwords passing through the router
B.by encrypting passwords in the plain text configuration file
C.by requiring entry of encrypted passwords for access to the device
D.by configuring an MD5 encrypted key to be used by routing protocols to validate routing exchanges
E.by automatically suggesting encrypted passwords for use in configuring the router
最新試題
傳輸層如何讓主機(jī)能同時(shí)針對(duì)不同應(yīng)用程序維護(hù)多個(gè)通信流?()
請(qǐng)參見圖示。網(wǎng)絡(luò)中的所有設(shè)備均使用默認(rèn)配置。此拓?fù)渲行枰嗌賯€(gè)邏輯地址范圍?()
路由器使用哪一項(xiàng)信息來確定源主機(jī)和目的主機(jī)之間的路徑?()
OSI 模型的哪兩項(xiàng)功能在第2層實(shí)現(xiàn)?()
請(qǐng)參見圖示。一臺(tái)主機(jī)正使用NAT 連接到Internet。下列哪三項(xiàng)IP 地址可實(shí)現(xiàn)此連接?()
請(qǐng)參見圖示。網(wǎng)絡(luò)技術(shù)人員使用圖中所示的連接將主機(jī)A 連接到路由器以創(chuàng)建初始配置。下列有關(guān)此連接的陳述中哪一項(xiàng)正確?()
請(qǐng)參見圖示。從主機(jī)X 發(fā)出的到主機(jī)Y 的tracert 命令已成功。下列哪一項(xiàng)正確地反映了追蹤列表中顯示的中間網(wǎng)絡(luò)設(shè)備的順序?()
請(qǐng)參見圖示。網(wǎng)絡(luò)中的主機(jī)A 正在向主機(jī)B 發(fā)送數(shù)據(jù)段。有關(guān)所交換的數(shù)據(jù)段的流量控制如圖所示。下列關(guān)于此通信的陳述,哪兩項(xiàng)是正確的?()
OSI 哪一層可提供有序的數(shù)據(jù)重構(gòu)服務(wù)?()
請(qǐng)參見圖示。網(wǎng)絡(luò)中的所有設(shè)備均使用默認(rèn)配置。此拓?fù)渲写嬖诙嗌賯€(gè)廣播域?()