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2021 Dec jk0-019 comptia network+ certification exam:
Q251. Kurt, an administrator, receives reports from users in an office that their 802.11g wireless connectivity has been problematic since the installation of the new wireless phone system. At which of the following frequencies are both systems operating at to cause this issue?
A. 2.4GHz
B. 900MHz
C. 1.1GHz
D. 5GHz
Answer: A
Q252. In which of the following topologies could the failure of one machine cause the entire network to stop functioning?
A. Mesh
B. Token ring
C. Star
D. Spanning tree
Answer: B
Q253. Sandy, an administrator, needs to install a wireless network that will allow legacy devices to connect to the network and also offer both 5GHz and 2.4GHz frequencies. Which of the following would BEST describe the type of WAP needed?
A. 802.11a
B. 802.11b
C. 802.11g
D. 802.11n
Answer: D
Q254. At which of the following layers does the TCP protocol operate?
A. Layer 1
B. Layer4
C. Layer 6
D. Layer 7
Answer: B
Q255. Which of the following describes what the number two represents in l00Base2 cabling?
A. Fiber
B. Coaxial cable
C. UTP
D. Twisted pair
Answer: B
Abreast of the times jk0-019 comptia network+ certification exam:
Q256. An administrator is troubleshooting a communication issue between two computers on the same Layer 2 switch. Which of the following is the BEST way to determine if the switch is causing the issue?
A. Setup an ACL that allows and logs all IP traffic between the two computers
B. Configure a spanning tree to check for a loop
C. Setup a span port on the switch to watch for CRC errors
D. Connect both computers using a crossover cable
Answer: D
Q257. A packet sniffer is MOST likely used to do which of the following?
A. Prevent network based attacks
B. Capture and analyze network traffic
C. Route IP packets to remote destinations
D. Record the switch ARP table
Answer: B
Q258. A technician wants to use an existing DHCP server for three additional VLANs. Which of the following features needs to be configured to allow for this addition?
A. DHCP server
B. Proxy server
C. Repeater
D. DHCP relay
Answer: D
Q259. A technician temporarily needs an additional network connection in their office to test a new workstation. Which of the following is the BEST solution to add a temporary network connection?
A. Install a small network switch
B. Use port mirroring on the switch
C. Split the pairs of the existing jack
D. Install a CSU/DSU
Answer: A
Q260. Determining when to retransmit frames is an example of which of the following Ethernet properties?
A. Carrier sense
B. Collision detection
C. Multiple access points
D. Collision avoidance
Answer: B