Which of the following would restrict traffic from a specific host to a network？（）A、MIBsB、NASC、ACLD、SMTP

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第4题：

Which of the following BEST describes a hub?（）

• A、Determines the best route to transmit data
• B、Inspects traffic and accepts or declines transmission
• C、Broadcasts data to specific network devices
• D、Broadcasts data to all network devices

正确答案:D

第5题：

Which of the following bottlenecks would MOST likely cause excessive hard drive activity?（）

• A、Inadequate RAM
• B、Slow processor
• C、PCI bus
• D、Excessive network traffic

正确答案:A

第6题：

Which of the following network devices would MOST likely be installed on a network to helpreduce broadcast traffic and to allow individual virtual networks?（）

• A、Switch
• B、Repeater
• C、Hub
• D、WAP

正确答案:A

第7题：

A technician needs to ensure that a specific application on a single home user's computer receives Internet traffic reliably. The home network provides access to three other users and the application relies on a specific protocol. Which of the following should the technician use?（）

• A、DHCP
• B、PAT
• C、Proxy
• D、IPX

正确答案:B

第8题：

Which of the following devices would need to be configured to block specific ports and protocols from entering the network?（）

• A、Bridge
• B、Firewall
• C、Port replicator
• D、Gateway

正确答案:B

第9题：

A host is to be part of a very small private network， which will never be connected to any other networks.  Which of the following name resolution schemes would be the easiest to implement？（）

• A、DNS
• B、NIS
• C、DHCP
• D、etc/hosts file

正确答案:D

第10题：

Given the configuration shown in the exhibit， which statement is true about traffic from host_ato host_b？（） [edit security policies from-zone HR to-zone trust] user@host# showpolicy two { match { source-address subnet_a； destination-address host_b； application [ junos-telnet junos-ping ]； } then { reject； } } policy one { match { source-address host_a； destination-address subnet_b； application any； } then { permit； } } host_a is in subnet_a and host_b is in subnet_b.

• A、DNS traffic is denied.
• B、Telnet traffic is denied.
• C、SMTP traffic is denied.
• D、Ping traffic is permitted

正确答案:B

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第16题：

Assume the default-policy has not been configured.Given the configuration shown in the exhibit， which two statements about traffic from host_a inthe HR zone to host_b in the trust zone are true？（） [edit security policies from-zone HR to-zone trust] user@host# show policy one { match { source-address any； destination-address any； application [ junos-http junos-ftp ]； } then { permit； } } policy two { match { source-address host_a； destination-address host_b； application [ junos-http junos-smtp ]； } then { deny； } }

• A、DNS traffic is denied.
• B、HTTP traffic is denied.
• C、FTP traffic is permitted.
• D、SMTP traffic is permitted.

正确答案:A,C

第17题：

Which of the following would be used to optimize network performance and increase bandwidth availability?（）

• A、Packet analysis
• B、QoS
• C、Traffic shaping
• D、Fault tolerance

正确答案:C

第18题：

Which of the following would be the BEST way to restrict access to the WAP from certain clients?（）

• A、Disable DHCP server
• B、Enable WEP encryption
• C、Disable SSID broadcast
• D、Enable MAC filtering

正确答案:D

第19题：

Which of the following traffic types would a network layer firewall be unable to filter?（）

• A、SMTP traffic
• B、ICMP messages
• C、HTTP traffic
• D、Email sender verification

正确答案:D

第20题：

Which of the following would be used to test out the security of a specific network by allowing it toreceive security attacks?（）

• A、Honeynet
• B、Honeypot
• C、Vulnerability scanner
• D、Network based IDS

正确答案:A

第21题：

You want to restrict access to a role based on the client machine from which the user is accessing the network.Which two role restrictions accomplish this goal? （）

• A、user name
• B、password length
• C、certificate
• D、Host Checker

正确答案:C,D

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