CompTIA Security+ Question I-28

Matt, the IT Manager, wants to create a new network available to virtual servers on the same hypervisor, and does not want this network to be routable to the firewall. How could this BEST be accomplished?

A. Create a VLAN without a default gateway.
B. Remove the network from the routing table.
C. Create a virtual switch.
D. Commission a stand-alone switch.

Answer: C

Explanation:
A Hyper-V Virtual Switch implements policy enforcement for security, isolation, and service levels.

CompTIA Security+ Question A-76

An organization is required to log all user internet activity. Which of the following would accomplish this requirement?

A. Configure an access list on the default gateway router. Configure the default gateway router to log all web traffic to a syslog server
B. Configure a firewall on the internal network. On the client IP address configuration, use the IP address of the firewall as the default gateway, configure the firewall to log all traffic to a syslog server
C. Configure a proxy server on the internal network and configure the proxy server to log all web traffic to a syslog server
D. Configure an access list on the core switch, configure the core switch to log all web traffic to a syslog server

Answer: C

CompTIA Network+ Question C-78

Which of the following helps prevent routing loops?

A. Routing table
B. Default gateway
C. Route summarization
D. Split horizon

Correct Answer: D

Explanation:
Routing loops occur when the routing tables on the routers are slow to update and a redundant communication cycle is created between routers. Split horizon, which prevents the router from advertising a route back to the other router from which it was learned, can be used to resist routing loops. Poison reverse, also known as split horizon with poison reverse, is also used to resist routing loops.

CompTIA Network+ Question C-54

A PC technician has installed a new network printer that was preconfigured with the correct static IP address, subnet mask, and default gateway. The printer was installed with a new cable and appears to have link activity, but the printer will not respond to any network communication attempts. Which of the following is MOST likely the cause of the problem?

A. Damaged cable
B. Duplex mismatch
C. Incorrect VLAN assignment
D. Speed mismatch

Correct Answer: C

Explanation:
If a port is accidentally assigned to the wrong VLAN in a switch, it’s as if that client was magically transported to another place in the network. This would explain the inability to communication with the printer, as it is on a different VLAN.

CompTIA Network+ Question C-33

While troubleshooting a connectivity issue, a network technician determines the IP address of a number of workstations is 169.254.0.0/16 and the workstations cannot access the Internet. Which of the following should the technician check to resolve the problem?

A. Default gateway address
B. Misconfigured DNS
C. DHCP server
D. NIC failure

Correct Answer: C

Explanation:
If a DHCP server fails, the workstations are assigned an address from the 169.254.0.0 address range by Automatic Private IP Addressing (APIPA). APIPA also configures a suitable subnet mask, but it doesn’t configure the system with a default gateway address. This allows communication on the local network, but not externally.

CompTIA Network+ Question C-11

A network technician has been assigned to install an additional router on a wireless network. The router has a different SSID and frequency. All users on the new access point and the main network can ping each other and utilize the network printer, but all users on the new router cannot get to the Internet. Which of the following is the MOST likely cause of this issue?

A. The gateway is misconfigured on the new router.
B. The subnet mask is incorrect on the new router.
C. The gateway is misconfigured on the edge router.
D. The SSID is incorrect on the new router.

Correct Answer: A

Explanation:
A missing or incorrect default gateway parameter limits communication to the local segment.
The question states: “All users on the new access point and the main network can ping each other and utilize the network printer, but all users on the new router cannot get to the Internet”.

CompTIA Network+ Question B-15

A company has changed ISPs for their office and ordered a new 250 Mbps symmetrical Internet connection. As a result, they have been given a new IP range. The ISP has assigned the company 10.10.150.16 /28. The company gateway router has the following interface configuration facing the ISP:
Interface A:
IP address: 10.10.150.16
Subnet mask: 255.255.255.240
Default gateway: 10.10.150.32
Speed: 1000 Mbps Duplex: Auto
State: No Shutdown

None of the workstations at the company are able to access the Internet. Which of the following are the reasons? (Select TWO).

A. There is a duplex mismatch between the router and ISP.
B. The router interface is turned off.
C. The interface is set to the incorrect speed.
D. The router is configured with the incorrect subnet mask.
E. The router interface is configured with the incorrect IP address.
F. The default gateway is configured incorrectly.

Correct Answer: EF

Explanation:
According to the IP Address Range Calculator, for the given subnet mask and the IP range address range assigned by the ISP, the first host address should be 10.10.150.17 and the broadcast address should be 10.10.150.31. Therefore, the router interface is configured with the incorrect IP address and the default gateway is configured incorrectly.

CompTIA Network+ Question A-90

A network engineer is troubleshooting an issue with a computer that is unable to connect to the Internet. The network engineer analyzes the following output from a command line utility:
Network DestinationNetmaskGatewayInterface 192.168.1.0 255.255.255.0192.168.1.254eth0
192.168.1.10255.255.255.255192.168.1.10eth0
127.0.0.1255.0.0.0On-Linlo
127.0.0.0255.0.0.0On-Linklo
255.255.255.255255.255.255.255102.168.1.10eth0
Which of the following is the reason for the computer issue, given the above output?

A. Wrong default gateway netmask
B. Incorrect default gateway address
C. Default gateway on the wrong interface
D. Missing default gateway

Correct Answer: D

Explanation:
The output appears to be a result of running the netstat –r command. If the default gateway was present, the first line would show the Network Destination as 0.0.0.0 and the Netmask as 0.0.0.0.

CompTIA Network+ Question A-48

A technician is attempting to resolve an issue with users on the network not being able to access websites. The technician pings the default gateway and DNS servers successfully. Pinging a website by URL is unsuccessful but using a known IP address is successful. Which of the following will resolve the issue?

A. Update the HOST file with the URLs for all websites
B. Use NSLOOKUP to resolve URLs
C. Ensure ICMP messages can pass through the firewall
D. Enable port 53 on the firewall

Correct Answer: D

CompTIA Network+ Question A-28

A network technician is troubleshooting a network connection error, when pinging the default gateway no reply is received. The default gateway is found to be functioning properly but cannot connect to any workstations. At which of the following OSI layers could the problem exist? (Select TWO)

A. Presentation
B. Transport
C. Session
D. Data link
E. Application
F. Physical

Correct Answer: DF