Network Troubleshooting Flashcards
What can cause a wireless signal to consistently drop, yet indicate a strong signal?
Bounce
Which utility will identify if the workstation uses DHCP?
ipconfig
What will allow the technician to perform tracert on external sites but not allow outsiders to discover information from inside the network?
Configure the firewall to allow echo reply in and echo request out of the network.
Which of the following will allow the administrator to log onto the firewall via HTTPS if the managements IP address is unknown and the administrators work IP address is 192.168.0.10/23?
Run this command on the admin workstation: arp -s 192.168.1.200 01:4a:d1:fa:b1:0e
Which command would you use to locate an unauthorized computer and determine the interface it is connected to?
show mac address-table
You have recently installed a web proxy server at a customers site. The following week, a system administrator replaced the DNS server overnight. The next day, customers began having issues accessing public websites. Which of the following will resolve the issue?
Update the DNS server with the proxy server information.
(Proxy servers act as an intermediary for requests from clients seeking resources from other servers. If the DNS server is not communicating with the proxy server, these requests are not forwarded. Therefore, updating the DNS server with the proxy server
information will solve the problem.)
Two weeks after installation, a network technician is now unable to log onto any of the newly installed company switches. The technician suspects that a malicious user may have changed the switches’ settings before they were installed in secure areas. Which of
the following is the MOST likely way in which the malicious user gained access to the switches?
A. Via SSH using the RADIUS shared secret
B. Via HTTP using the default username and password
C. Via console using the administrator’s password
D. Via SNMP using the default RO community
B. Via HTTP using the default username and password
A network technician has been assigned to install an additional router on a wireless network. The router has a different SSID and frequency. All users on the new access point and the main network can ping each other and utilize the network printer, but all users on the new router cannot get to the internet. Which of the following is the most likely cause of this issue?
A. The gateway is misconfigured on the new router.
B. The subnet mask is incorrect on the new router.
C. The gateway is misconfigured on the edge router.
D. The SSID is incorrect on the new router.
B. The gateway is misconfigured on the new router
A network technician ks troubleshooting a problem at a remote site. It has been determined that the connection from router A to router B is down. The technician at the remote site re-terminates the CAT5 cable that routers as a straight through cable. The cable is then tested and is plugged into the correct interface, Which of the following would be the result?
A. The normal amount of errors and the connection problem has been resolved.
B. The interface status will indicate that the port is administratively down.
C. The traffic will flow, but with excessive errors.
D. The interface status will show line protocol down.
D. The interface status will show line protocol down
After repairing a computer infected with malware, a technician determines that the web browser fails to go to the proper address for some sites. Which of the following should be checked?
A. Server host file
B. Subnet mask
C. Local hosts file
D. Duplex settings
C. Local hosts file
