2026 VERIFIED Computer Networks – Network Troubleshooting and Diagnostic Tools. EXAM WITH CORRECT ANSWERS
Exam A
QUESTION 1
Users are reporting Internet connectivity issues. The network administrator wants to determine if the issues are internal
to the company network or if there is an issue with the ISP. Which of the following tools should be used to BEST
determine where the outage is occurring?
A. traceroute
B. ping
C. nslookup
D. netstat
Correct Answer: A
QUESTION 2
Which of the following security mechanisms dynamically assigns a Layer 2 address and restricts traffic only to that Layer
2 address?
A. Sticky MAC
B. 802.1x
C. ACL
D. NAC
Correct Answer: A
QUESTION 3
Which of the following is a vulnerable system designed to detect and log unauthorized access?
A. SIEM
B. Honeypot
C. DMZ
D. Proxy server
Correct Answer: B
QUESTION 4
According to the OSI model, at which of the following layers is data encapsulated into a packet?
A. Layer 2
B. Layer 3
C. Layer 4
D. Layer 5
E. Layer 6
Correct Answer: B
QUESTION 5
Which of the following WAN technologies is MOST preferred when developing a VoIP system with 23 concurrent
, 2026 VERIFIED Computer Networks – Network Troubleshooting and Diagnostic Tools. EXAM WITH CORRECT ANSWERS
channels?
A. DSL
B. POTS
, 2026 VERIFIED Computer Networks – Network Troubleshooting and Diagnostic Tools. EXAM WITH CORRECT ANSWERS
C. T1
D. DOCSIS
Correct Answer: C
QUESTION 6
A junior network technician is setting up a new email server on the company network. Which of the following default
ports should the technician ensure is open on the firewall so the new email server can relay email?
A. 23
B. 25
C. 110
D. 143
Correct Answer: B
QUESTION 7
Which of the following policies would Joe, a user, have to agree to when he brings in his personal tablet to connect to the
company’s guest wireless Internet?
A. NDA
B. IRP
C. BYOD
D. SLA
Correct Answer: C
QUESTION 8
In a service provider network, a company has an existing IP address scheme. Company A’s network currently uses the
following scheme:
Company b uses the following scheme:
Subnet 1: 192.168.1.50/28
The network administrator cannot force the customer to update its IP scheme. Considering this, which of the following is
the BEST way for the company to connect
these networks?
A. DMZ
B. PAT
C. NAT
D. VLAN
Correct Answer: C
QUESTION 9
, 2026 VERIFIED Computer Networks – Network Troubleshooting and Diagnostic Tools. EXAM WITH CORRECT ANSWERS
A network engineer is designing a new network for a remote site. The remote site consists of ten desktop computers, ten
VoIP phones, and two network printers. In addition, two of the desktop computers at the remote site will be used by
managers who should be on a separate network from the other eight computers. Which of the following represents the
BEST configuration for the remote site?
Exam A
QUESTION 1
Users are reporting Internet connectivity issues. The network administrator wants to determine if the issues are internal
to the company network or if there is an issue with the ISP. Which of the following tools should be used to BEST
determine where the outage is occurring?
A. traceroute
B. ping
C. nslookup
D. netstat
Correct Answer: A
QUESTION 2
Which of the following security mechanisms dynamically assigns a Layer 2 address and restricts traffic only to that Layer
2 address?
A. Sticky MAC
B. 802.1x
C. ACL
D. NAC
Correct Answer: A
QUESTION 3
Which of the following is a vulnerable system designed to detect and log unauthorized access?
A. SIEM
B. Honeypot
C. DMZ
D. Proxy server
Correct Answer: B
QUESTION 4
According to the OSI model, at which of the following layers is data encapsulated into a packet?
A. Layer 2
B. Layer 3
C. Layer 4
D. Layer 5
E. Layer 6
Correct Answer: B
QUESTION 5
Which of the following WAN technologies is MOST preferred when developing a VoIP system with 23 concurrent
, 2026 VERIFIED Computer Networks – Network Troubleshooting and Diagnostic Tools. EXAM WITH CORRECT ANSWERS
channels?
A. DSL
B. POTS
, 2026 VERIFIED Computer Networks – Network Troubleshooting and Diagnostic Tools. EXAM WITH CORRECT ANSWERS
C. T1
D. DOCSIS
Correct Answer: C
QUESTION 6
A junior network technician is setting up a new email server on the company network. Which of the following default
ports should the technician ensure is open on the firewall so the new email server can relay email?
A. 23
B. 25
C. 110
D. 143
Correct Answer: B
QUESTION 7
Which of the following policies would Joe, a user, have to agree to when he brings in his personal tablet to connect to the
company’s guest wireless Internet?
A. NDA
B. IRP
C. BYOD
D. SLA
Correct Answer: C
QUESTION 8
In a service provider network, a company has an existing IP address scheme. Company A’s network currently uses the
following scheme:
Company b uses the following scheme:
Subnet 1: 192.168.1.50/28
The network administrator cannot force the customer to update its IP scheme. Considering this, which of the following is
the BEST way for the company to connect
these networks?
A. DMZ
B. PAT
C. NAT
D. VLAN
Correct Answer: C
QUESTION 9
, 2026 VERIFIED Computer Networks – Network Troubleshooting and Diagnostic Tools. EXAM WITH CORRECT ANSWERS
A network engineer is designing a new network for a remote site. The remote site consists of ten desktop computers, ten
VoIP phones, and two network printers. In addition, two of the desktop computers at the remote site will be used by
managers who should be on a separate network from the other eight computers. Which of the following represents the
BEST configuration for the remote site?
