單項選擇題最早的網(wǎng)絡(luò)安全工具是()

A.ACS
B.IPS
C.IDS
D.IPSec


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1.單項選擇題Which parameter or parameters are used to calculate OSPF cost in cisco routers?()

A.Bandwidth,Delay,and MTUB
B.andwidth
C.Bandwidth and MTU
D.Bandwidth,MTU,Reliability,Delay,and Load

2.單項選擇題Which Cisco Catalyst feature automatically disables the port in an operational PortFast upon receipt of a BPDU?()

A.BackboneFast
B.UplinkFast
C.Root Guard
D.BPDU Guard
E.BPDU Filter

3.單項選擇題Host 1 receives a file from remote server 1. Which MAC address appears as the source address in the header of the frames received by Host 1()。

A.The MAC address of the NIC in Host 1
B.The MAC address of the NIC in server 1
C.The MAC address of the Fa0/0 interface of router R1
D.The MAC address of the s0/0/0 interface of the router R2

4.多項選擇題By default, each port in a Cisco Catalyst switch is assigned to VLAN1. Which two recommendations are key to avoid unauthorized management access? ()

A.Create an additional ACL to block the access to VLAN 1.
B.Move the management VLAN to something other than default.
C.Move all ports to another VLAN and deactivate the default VLAN.
D.Limit the access in the switch using port security configuration.
E.Use static VLAN in trunks and access ports to restrict connections.
F.Shutdown all unused ports in the Catalyst switch.

5.多項選擇題

Your boss is learning a CCNA training course,refer to the exhibit.The access list has been configured on the S0/0 interface of router RTB in the outbound direction.Which two packets,if routed to the interface,will be denied?()
access-list 101 denytcp192.168.15.320.0.0.15any eq telnet
access-list 101 permitip any any

A.source ip address:192.168.15.5;destination port: 21
B.source ip address:,192.168.15.37 destination port: 21
C.source ip address:,192.168.15.41 destination port: 21
D.source ip address:,192.168.15.36 destination port: 23
E.source ip address:192.168.15.46;destination port: 23
F.source ip address:,192.168.15.49 destination port: 23

6.多項選擇題Host 1 has just started up and requests a web page from web server 2. Which two statements describe steps in the process Host 1 uses to send the request to web server 2 (choose two)()。

A.Host 1 addresses the frames to the MAC address of router R1
B.Host 1 looks in its ARP cache for the MAC address of router R1
C.Host 1 addresses the frames to the MAC address of web server 2
D.Host 1 sends the packets to router R1 to be forwarded to web server 2
E.Host 1 sends a broadcast ARP request to obtain the MAC address of webserver2

8.多項選擇題Which two statements apply to dynamic access lists?()

A.they offer simpler management in large internetworks.
B.you can control logging messages.
C.they allow packets to be filtered based on upper-layer session information.
D.you can set a time-based security policy.
E.they provide a level of security against spoofing.
F.they are used to authenticate individual users

9.多項選擇題

Refer to the exhibit.Which two statements are true of the interfaces on switch1?()

A.A hub is connected directly to FastEthernet0/5
B.FastEthernet0/1 is configured as a trunk link.
C.FastEthernet0/5 has statically assigned mac address
D.Interface FastEthernet0/2 has been disable.
E.Multiple devices are connected directly to FastEthernet0/1.
F.FastEthernet0/1 is connected to a host with multiple network interface cards.

最新試題

請參見圖示。主機(jī)A 嘗試與主機(jī)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?()

題型:單項選擇題

請參見圖示。圖中所示路由表所屬的PC 已正確配置。IP 地址192.168.1.254屬于哪一個網(wǎng)絡(luò)設(shè)備或接口?()

題型:單項選擇題

路由器使用哪一項信息來確定源主機(jī)和目的主機(jī)之間的路徑?()

題型:單項選擇題

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(jìn)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(yīng)在RouterA 上采取什么措施來解決此問題?()

題型:單項選擇題

請參見圖示。電纜1和電纜2分別按照特定的物理層要求接線。哪三個網(wǎng)段使用電纜2?()

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請參見圖示。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€廣播域?()

題型:單項選擇題

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?()

題型:單項選擇題

請參見圖示。一臺主機(jī)正使用NAT 連接到Internet。下列哪三項IP 地址可實(shí)現(xiàn)此連接?()

題型:多項選擇題

請參見圖示。主機(jī)A 和B 無法互相通信。此問題的原因是什么?()

題型:單項選擇題

OSI 哪一層可提供有序的數(shù)據(jù)重構(gòu)服務(wù)?()

題型:單項選擇題