CompTIA A+ Core 2 Question E-55

A user states that when they logon to their computer sometimes they get an IP conflict error. The user computer is configured with a static IP. Which of the following is the problem?

A. Duplicate IP exist on the network
B. DHCP server needs to be rebooted
C. Network adapter driver needs to be updated
D. Bad network adapter

Correct Answer: A

Explanation:
http://support.microsoft.com/kb/120599

CompTIA A+ Core 2 Question C-82

A new LAN drop has been activated but users report that they are unable to connect to the Internet and are receiving an IP address of 169.254.255.55 from that Windows workstation. Which of the following symptoms has occurred? (Select TWO).

A. DHCP server unavailable
B. IP address assigned by NAT
C. Limited connectivity
D. APIPA address assigned
E. IP conflict detected
F. Statically assigned IP address

Correct Answer: AD

CompTIA A+ Core 2 Question C-33

A small library has an integrated switch and router that is not wireless. All of the public PCs in the library are connected to the device. Which of the following is the FIRST thing the library should do to deter curious patrons from interfering with the device?

A. Configure DNS to resolve externally rather than internally
B. Enable MAC filtering to permit public PCs
C. Change the default user name and password
D. Set up the DHCP server to use a different gateway option

Correct Answer: C

CompTIA A+ Question L-87

A network technician has been tasked with deploying new VoIP phones on a network. When the technician plugs the Ethernet cable for the phone into the wall port, the phone fails to turn on. When the technician plugs the Ethernet cable directly into the computer, the computer is able to access the network. Which of the following is the MOST likely cause of this issue?

A. The network switch does not support PoE
B. The technician is connecting the phone to the wrong type of port
C. The firewall on the network is blocking access to the DHCP server
D. The Ethernet cable is the wrong type

Correct Answer: A

CompTIA A+ Question G-33

A computer technician is installing a new wireless router for a small office. The office already has an internal device that assigns addresses to users. Which of the following functions needs to be disabled on the router to prevent conflicts?

A. DMZ capability
B. MAC filtering capability
C. Network Address Translation
D. DHCP server functionality

Correct Answer: D

Explanation:
DHCP automatically assigns IP address, subnet mask and default gateway to provide access to workstations. Disable DHCP server before installing a wireless router so that you can configure it without DHCP assigning IP addresses to other computers.

CompTIA A+ Question F-2

A machine receives an IP address starting with 169.254.x.x when which of the following occurs?

A. When the machine is using IPv6
B. When the next IP range begins with 169.253
C. When the DHCP server does not respond
D. When the operating system is Unix or Linux

Correct Answer: C

CompTIA A+ Question B-45

A new secure SOHO is being setup using a wireless network. The users do not want any surrounding neighbors to be able to use this new network. Which of the following would MOST likely need to be configured? (Select TWO).

A. Configure WAP to use Channel 7
B. Configure WAP to use Channel 11
C. Enable SSID broadcast
D. Disable SSID broadcast
E. Enable DHCP server on the router
F. Configure wireless encryption