Which of the following is the subnet mask for a Class A IP address?
A. 127.0.0.1
B. 255.0.0.0
C. 255.255.255.0
D. 255.255.255.254
CompTIA A+ Question C-15
Which of the following describes a Class A IP address?
A. The last octet is between 1 and 128 with a subnet mask of 255.0.0.0
B. The first octet is between 1 and 128 with a subnet mask of 255.255.255.0
C. The first octet is between 1 and 128 with a subnet mask of 255.0.0.0
D. The last octet is between 1 and 128 with a subnet mask of 255.255.255.0
CompTIA A+ Question B-100
Which of the following network devices uses NAT to convert private IP addresses into public IP addresses?
A. NAS
B. Firewall
C. Hub
D. Bridge
CompTIA A+ Question B-99
A user on a wireless network has the IP address 169.254.155.2 but cannot connect to the Internet. Which of the following should the user check on the wireless router?
A. WPA
B. DHCP
C. WINS
D. DNS
CompTIA A+ Question B-93
A workstation has a network link light, but it cannot access internal network resources. Which of the following is the MOST likely cause of the issue?
A. Slow transfer speeds
B. IP address conflict
C. Incorrect gateway
D. Packet collisions
CompTIA A+ Question B-71
A technician notices that the PC is not receiving an IP address. Which of the following tools would the technician use to troubleshoot the computer’s NIC?
A. Loopback plugs
B. ESD mat
C. Cable tester
D. Toner probe
CompTIA A+ Question B-21
A SOHO environment utilizes network hardware address filtering to minimize unauthorized use of its network infrastructure. A technician has been asked to install a shared network printer in the environment. Which of the following MUST the technician know in order to add the printer to the environment?
A. IP address of the printer
B. MAC address of the printer
C. Subnet mask of the network
D. Firmware version of the printer
CompTIA A+ Question A-86
Which of the following is a public IP address?
A. 10.4.160.1
B. 55.5.254.1
C. 172.17.45.12
D. 192.168.100.100
CompTIA A+ Question A-49
Which of the following is the purpose of DHCP?
A. Resolves host names to IP addresses
B. Assigns MAC address hosts on a network
C. Resolves host names to MAC addresses
D. Ability to automate the IP schema to hosts
CompTIA A+ Question A-34
A user has received an error message when connecting to the wireless network. The error indicates the IP address being used by the user’s system is already in use. A DHCP server is used on the network. After having the user disconnect from the wireless network, the technician is still able to ping the user’s IP address. Which of the following is MOST likely the cause?
A. The user has a statically assigned IP address in the DHCP server scope.
B. The system’s local firewall is blocking SYN/ACK traffic from the DHCP server.
C. The DHCP server’s scope has been exhausted and no additional IP addresses are available.
D. The user is also connected to the wired network with a LAN cable.