CompTIA Network+ Pretest 3

Lisa, a consultant, is inspecting an office that reports frequent wireless issues. Upon scanning the network broadcasting in the vicinity of the office, seven SSIDs are found. The company's Wi-Fi network and three others all share channel six. Which of the following is MOST likely causing the issue?

• Frequency interference

• Low signal strength

• Standard mismatch

• Incorrect channel

Which of the following DNS record types will be used for mail transfer if the MX record is not found? [most common record]

• CNAME

• A

• PTR

• AAAA

Which of the following issues is a common problem in wireless infrastructures?

• Incorrect port number

• Mismatched SSIDs

• Invalid telnet sessions

• Too many collisions

Lisa, a user, is unable to access the Internet. The network administrator notices that the workstation has an APIPA address. Which of the following is MOST likely not functioning correctly in this situation?

• Broadcast address

• Multicast address

• DNS

• DHCP

Lisa, the network technician, has been instructed to provide connectivity to workstations within a SOHO that is over 800 feet (243 meters) away from the main switch. Which of the following would she install to provide connectivity?

• CAT5e

• CAT6

• Coaxial

• Multimode fiber

Which of the following DHCP options would need to be configured to ensure certain IP addresses within a scope are not leased out?

• DNS IP address information

• WINS IP address information

• Superscopes

• Reservations

Which of the following could cause employees to be redirected to an incorrect site after typing in the correct name in a web browser?

• DNS cache poisoning

• Mismatched MTU

• Incorrect DHCP address

• Duplicate IP address

Which of the following default ports are used with DHCP? (Select TWO).

• 22

• 21

• 67

• 68

Which of the following is a reason to use dynamic DNS?

• The host IP address is not listed in the firewall.

• The host IP address is assigned by DHCP.

• Static routes cannot be used on the host network.

• A third-party certificate is being used.

Jeff, a user, can no longer access the accounting file share, but others are still able to access the share. Which of the following would be the FIRST step in troubleshooting the issue?

• Notify senior management of the issue.

• Develop a probable cause theory.

• Ask Jeff if anything has changed on the system.

• Escalate the issue to the vendor.