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2021 Jan comptia jk0-019 exam:

Q311. Which of the following LAN technology has a MAXIMUM range of 10,000 meters (6 miles)? 

A. 10GBaseER 

B. 10GBaseSW 

C. 10GBaseLW 

D. 10GBaseEW 

Answer: C 


Q312. Which of the following OSI model layers is used for logical addressing? 

A. Physical 

B. Transport 

C. Network 

D. Data link 

Answer: C 


Q313. A small amount of spoofed packets are being sent across a network and a large amount of reply packets are being sent back to the network resource. Which of the following BEST describes this security threat? 

A. Worm 

B. Smurf 

C. Logic Bomb 

D. Man-in-the-middle 

Answer: B 


Q314. Two business partners have recently been connected via a dedicated extranet. It has been discovered that each of the companies are using the same private IP address space. Which of the following will help to resolve potential routing issues? 

A. Multicast 

B. PAT 

C. CIDR 

D. NAT 

Answer: D 


Q315. Which of the following is used by RADIUS to encrypt messages between the server and the client? 

A. Public key 

B. CSU/DSU 

C. Private key 

D. Shared secret 

Answer: D 


Abreast of the times jk0-019 vs jk0-023:

Q316. Joe, a network technician, has configured a server with the following IP settings: 

IP Address: 192.168.1.40/27 

Default Gateway: 192.168.1.64 

DNS: 192.168.1.33 

The server cannot access the Internet. Which of the following settings needs to be changed? 

A. Default gateway 

B. IP address 

C. VLAN 

D. DNS 

Answer: A 


Q317. Which of the following networking protocols would Kurt, a technician, use to standardize correct time on network devices? 

A. NTP 

B. RTP 

C. FTP 

D. TFTP 

Answer: A 


Q318. Kurt, the network administrator, has just finished installing a new 10/100/1000 switch, but receives reports from the server administrator that servers connected to the new switch seem to be experiencing slow LAN connections. Kurt checks the port connecting the new switch to the core switch and sees the following information: 

#show run interface GigabitEthernet 0/10 

Switchport trunk encapsulation dotlq 

Switchport mode trunk 

Switchport trunk native VLAN 10 

Which of the following is the MOST likely cause of the slow connections? 

A. The servers have not had VLAN tagging enabled on their NICs 

B. Speed and duplex have not been set 

C. VLAN tagging was not set on the trunk 

D. The servers have been connected with CAT5 cable 

Answer: B 


Q319. Which of the following connectivity issues is likely to occur within a token ring network? 

A. Crosstalk 

B. Broadcast storm 

C. Duplex mismatch 

D. Collision 

Answer: D 


Q320. After a baseline check was completed it was noted that the network was working far below the level of the last baseline. Which of the following should the technician do NEXT to determine where the network problems are occurring? 

A. Upgrade the firmware on all routers and switches 

B. Reboot the entire network one device at a time 

C. Conduct a network traffic analysis 

D. Rerun the baseline to ensure the results were correct 

Answer: C