Which of the following is BEST for providing network security?（）A、FirewallB、DMZC、SwitchD、IDS

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第3题：

Which one is the most important based on the following common elements of a network design？（）

• A、Business needs
• B、Risk analysis
• C、Security policy
• D、Best practices

正确答案:A

第4题：

Which of the following network hardware allows the MOST network traffic collisions?（）

• A、WAP
• B、Hub
• C、Switch
• D、Router

正确答案:B

第5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6题：

Which of the following technologies allows multiple logical subnets to span an entire physical switched network？（）

• A、 ARP
• B、 DMZ
• C、 VLAN
• D、 VPN

正确答案:C

第7题：

Which two statements best describe the Cisco Unified Wireless Network？（）

• A、 The Cisco Unified Wireless Network provides the framework to segregate wired and wirelessnetworks to deliver the best security for companies that are deploying WLANs.
• B、 The Cisco Unified wireless Network provides the framework to integrate and extend wired andwireless networks to deliver the lowest-possible total cost or ownership for companies that aredeploying WLANs
• C、 The Cisco Unified Wireless Network extends "wireless awareness" into important elements ofthe network infrastructure， providing the same level of security for WLANs that organizations havecome to expect from their VPNs.
• D、 The Cisco unified Wireless Network extends "wireless awareness" into important elements ofthe network infrastructure， providing the same level of security scalability， reliability ease ofdeployment and management for WLANs that organizations have come to expect from their wiredLANs.

正确答案:B,D

第8题：

For security reasons a network technician wants to install a Linux based email server, Microsoft web services, and directory services on different servers. Which of the following technologies would be BEST to reduce hard ware costs?（）

• A、VPN concentrator
• B、Virtual servers
• C、Wireless
• D、Multimode fiber

正确答案:B

第9题：

Which of the following BEST describes the function of a DNS server?（）

• A、Secures network traffic through shared key encryption.
• B、Provides resolution of host names to IP addresses.
• C、Provides security for a network through the use of ACLs.
• D、Dynamically assigns IP addresses for easy client configuration.

正确答案:B

第10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

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第15题：

Which of the following is not a typical maintenance task within a network maintenance model？（）

• A、Providing technical customer support
• B、Changing configurations
• C、Updating software
• D、Monitoring network performance
• E、Replacing hardware
• F、Scheduling backups

正确答案:A

第16题：

A company wants to secure access to its internal wireless network. The company wants to use themost secure means to access the network. Which of the following is the BEST choice for wireless security in this situation?（）

• A、WEP encryption
• B、Channel rotation
• C、Disable SSID
• D、WPA encryption

正确答案:D

第17题：

Which of the following would be BEST to use when identifying HTTP traffic running on TCP port53?（）

• A、Network layer firewall
• B、Stateful inspection firewall
• C、Zone aware firewall
• D、Application layer firewall

正确答案:D

第18题：

A customer, who brings their laptop to work on a daily basis, calls to ask for the best way to add USB ports and an additional network card to their laptop. Which of the following would meet the user’s requirements?（）

• A、Docking station
• B、Self powered USB hub
• C、KVM switch
• D、Non-powered USB hub

正确答案:A

第19题：

Which one of the following is the most commonly used layer 2 network device?（）

• A、Hub
• B、Bridge
• C、Switch
• D、Router
• E、Repeaters
• F、None of the above

正确答案:C

第20题：

When configured. MPLS can increase routing redundancy by providing which of the following network topology types?（）

• A、Bus
• B、Mesh
• C、Multipath
• D、Ring

正确答案:B

第21题：

A small amount of spoofed packets are being sent across a network and a large amount of reply packets are being sent back to the network resource. Which of the following BEST describes this security threat?（）

• A、Worm
• B、Smurf
• C、Logic Bomb
• D、Man-in-the-middle

正确答案:B

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