WGU Study Guide & Practice Questions
(Updated 2026)
A network is experiencing a number of CRC errors during normal network communication. At which of
the following layers of the OS model will the administrator
MOST likely start to troubleshoot?
A. Layer 1
B. Laver 2
C. Layer 3
D. Layer 4
E. Layer 5
F. Layer 6
G. Layer 7 -answer ✔✨---Layer 1
A branch of a company recently switched to a new ISP. The network engineer was given a new IP range
to assign. The ISP assigned 196.26.4.0/26, and the branch gateway router now has the following
configurations on the interface that peers to the ISP:
IP address: 196.26.4.30
Subnet mask: 255.255.255.224
Gateway: 196.24.4.1
,The network engineer observes that all users have lost Internet connectivity. Which of the following
describes the issue?
A. The incorrect subnet mask was configured
B. The incorrect gateway was configured
C. The incorrect IP address was configured
D. The incorrect interface was configured -answer ✔✨---The incorrect gateway was configured
Which of the following factors should be considered when evaluating a firewall to protect a datacenter's
east-west traffic?
A. Replication traffic between an on-premises server and a remote backup facility
B. Traffic between VMs running on different hosts
C. Concurrent connections generated by Internet DDoS attacks
D. VPN traffic from remote offices to the datacenter's VMs -answer ✔✨---Replication traffic
between an on-premises server and a remote backup facility
A technician is deploying a new switch model and would like to add it to the existing network monitoring
software. The technician wants to know what metrics can be gathered from a given switch. Which of the
following should the technician utilize for the switch?
A. MIB
B. Trap
C. Syslog
D. Audit log -answer ✔✨---MIB
A network device is configured to send critical events to a syslog server; however, the following alerts
are not being received:
Severity 5 LINK-UPDOWN: Interface 1/1, changed state to down
Severity 5 LINK-UPDOWN: Interface 1/3, changed state to down
Which of the following describes the reason why the events are not being received?
, A. The network device is not configured to log that level to the syslog server
B. The network device was down and could not send the event
C. The syslog server is not compatible with the network device
D. The syslog server did not have the correct MIB loaded to receive the message -answer ✔✨---
The network device is not configured to log that level to the syslog server
A network administrator is implementing OSPF on all of a company's network devices. Which of the
following will MOST likely replace all the company's hubs?
A. A Layer 3 switch
B. A proxy server
C. A NGFW
D. A WLAN controller -answer ✔✨---Layer 3 switch
A network administrator is configuring a load balancer for two systems. Which of the following must the
administrator configure to ensure connectivity during a failover?
A. VIP
B. NAT
C. APIPA
D. IPv6 tunneling
E. Broadcast IP -answer ✔✨---VIP
Which of the following routing protocols is used to exchange route information between public
autonomous systems?
A OSPE
B. BGP
C. EIGRP
D. RIP -answer ✔✨---BGP
A fiber link connecting two campus networks is broken. Which of the following tools should an engineer
use to detect the exact break point of the fiber link?
(Updated 2026)
A network is experiencing a number of CRC errors during normal network communication. At which of
the following layers of the OS model will the administrator
MOST likely start to troubleshoot?
A. Layer 1
B. Laver 2
C. Layer 3
D. Layer 4
E. Layer 5
F. Layer 6
G. Layer 7 -answer ✔✨---Layer 1
A branch of a company recently switched to a new ISP. The network engineer was given a new IP range
to assign. The ISP assigned 196.26.4.0/26, and the branch gateway router now has the following
configurations on the interface that peers to the ISP:
IP address: 196.26.4.30
Subnet mask: 255.255.255.224
Gateway: 196.24.4.1
,The network engineer observes that all users have lost Internet connectivity. Which of the following
describes the issue?
A. The incorrect subnet mask was configured
B. The incorrect gateway was configured
C. The incorrect IP address was configured
D. The incorrect interface was configured -answer ✔✨---The incorrect gateway was configured
Which of the following factors should be considered when evaluating a firewall to protect a datacenter's
east-west traffic?
A. Replication traffic between an on-premises server and a remote backup facility
B. Traffic between VMs running on different hosts
C. Concurrent connections generated by Internet DDoS attacks
D. VPN traffic from remote offices to the datacenter's VMs -answer ✔✨---Replication traffic
between an on-premises server and a remote backup facility
A technician is deploying a new switch model and would like to add it to the existing network monitoring
software. The technician wants to know what metrics can be gathered from a given switch. Which of the
following should the technician utilize for the switch?
A. MIB
B. Trap
C. Syslog
D. Audit log -answer ✔✨---MIB
A network device is configured to send critical events to a syslog server; however, the following alerts
are not being received:
Severity 5 LINK-UPDOWN: Interface 1/1, changed state to down
Severity 5 LINK-UPDOWN: Interface 1/3, changed state to down
Which of the following describes the reason why the events are not being received?
, A. The network device is not configured to log that level to the syslog server
B. The network device was down and could not send the event
C. The syslog server is not compatible with the network device
D. The syslog server did not have the correct MIB loaded to receive the message -answer ✔✨---
The network device is not configured to log that level to the syslog server
A network administrator is implementing OSPF on all of a company's network devices. Which of the
following will MOST likely replace all the company's hubs?
A. A Layer 3 switch
B. A proxy server
C. A NGFW
D. A WLAN controller -answer ✔✨---Layer 3 switch
A network administrator is configuring a load balancer for two systems. Which of the following must the
administrator configure to ensure connectivity during a failover?
A. VIP
B. NAT
C. APIPA
D. IPv6 tunneling
E. Broadcast IP -answer ✔✨---VIP
Which of the following routing protocols is used to exchange route information between public
autonomous systems?
A OSPE
B. BGP
C. EIGRP
D. RIP -answer ✔✨---BGP
A fiber link connecting two campus networks is broken. Which of the following tools should an engineer
use to detect the exact break point of the fiber link?
