Network troubleshooting
When troubleshooting a network error, a technician using a laptop as a network sniffer can see all the communications on the network segment. Which of the following network devices is the laptop plugged into?
Hub
Which of the following devices should Joe, an administrator, connect to a protocol analyzer in order to collect all of the traffic on a LAN segment?
Hub
Which of the following troubleshooting steps should be performed NEXT after a core router has been reported down?
Identify all affected areas
Users are reporting that they are still experiencing network issues even though a fix was recently applied. Which of the following troubleshooting methodology steps is the administrator using?
Testing the solution and identifying the effects
A network administrator is troubleshooting a connectivity problem between a PC and a remote site. An ICMP traceroute reveals that after several hops, addresses start repeating and TTL-exceeded messages are returned. Which of the following problems is the cause?
A routing loop
Joe, a user, can no longer access the accounting file share, but others are still able to access the share. Which of the following would be the FIRST step in troubleshooting the issue?
Ask Joe if anything has changed on the system
An improperly configured the AS number on the device would result in which of the following?
BGP routing issues
An administrator is troubleshooting an network using OSPF. The data is transmitting on the Internet but it is queuing up before it is transmitted. Only one port going out to the Internet is congested. Which of the following would resolve this issue? Output: Fast Ethernet 0 is up, line protocol is up Int ip address is 10.20.130.5/25 MTU 1500 bytes, BW10000 kbit, DLY 100 usec Reliability 255/255, Tx load 1/255, Rx load 1/255 Encapsulation ospf, loopback not set Keep alive 10 Half duplex, 100Mb/s, 100 Base Tx/Fx Received 1052993 broadcasts 0 input errors 983881 packets output, 768588 bytes 0 output errors, 0 collisions, 0 resets
Change duplex to full
A network technician is performing a tracert command to troubleshoot a website-related issue. The following output is received for each hop in the tracert: 1 * * * Request timed out. 2 * * * Request timed out. 3 * * * Request timed out. The technician would like to see the results of the tracert command. Which of the following 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
A user cannot connect to the network. You verify that there is no connection and that only that user's workstation is affected. Which of the following should be the next troubleshooting step the technician should take?
Determine if anything has changed
A workstation gives and error message that states that a duplicate IP address has been detected on the network. Which of the following should the network technician do NEXT?
Determine if anything has changed
Shelly, a network administrator, is responding to a support ticket. The ticket does not have enough information to determine the problem. Which of the following should Shelly perform FIRST before responding to the ticket?
Determine if anything has changed
A remote user cannot connect to the office via VPN. A user has established Internet connectivity. Which of the following is the MOST likely next step in troubleshooting?
Determine if the user has the correct VPN address and password
A college dorm reports they are no longer able to access the network for the library. Several users are reporting they can't log on to the network and the error received is there is duplicate IP address. Which of the following should the technician do NEXT in the troubleshooting methodology?
Establish a plan to locate the rogue DHCP server
The helpdesk is receiving calls about the corporate web server being down. Which of the following should be taken NEXT after verifying that the server is unreachable?
Escalate the call to a technician
Alan, a technician, spoke to a user regarding a network problem. He searched all the logs associated with the problem and pulled the change logs for the network environment. Which of the following should Alan perform?
Establish a theory of probable cause
A user can't print to a network printer. Which of the following troubleshooting steps should the technician take FIRST?
Identify the symptoms
A section of the building has been having intermittent connectivity problems lately. An action plan and solution has been created. Which of the following steps would an administrator perform NEXT?
Implement and test the solution
After Shane, a technician, has established a plan of action to resolve the problem, which of the following steps should he perform NEXT?
Implement the solution or escalate as necessary
A user calls the help desk and states that she is trying to connect to the printer but cannot. However, her colleagues are able to connect without a problem. Which of the following should be the FIRST question the helpdesk asks?
Is the user able to access any network resources?
A computer infected with malware fails to go to the proper web site address after the malware is removed. Which of the following should be checked?
Local hosts file
Troubleshoot an issue with a computer that is unable to connect to the Internet. Analyzes the following output from a command line utility: Network Destination Netmask Gateway Interface 192.168.1.0 255.255.255.0 192.168.1.254 eth0 192.168.1.10255.255.255.255 192.168.1.10 eth0 127.0.0.1255.0.0.0 On-Link lo 127.0.0.0255.0.0.0 On-Link lo 255.255.255.255255.255.255.255 102.168.1.10 eth0 Which of the following is the reason for the computer issue, given the above output?
Missing default gateway
A user reports being occasionally disconnected from the server. Which of the following tools could the technician use to determine if it is the client or the server that is dropping the connection?
Packet sniffer
Which of the following is a probable cause of the error when a newly installed TFTP server can't transfer files?
Port 69 is blocked on a router between the network segments
Which of the following would have been used with a DB9 connector?
RS-232
After connecting a workstation directly to a small business firewall, a network administrator is trying to manage it via HTTPS without losing its stored configuration. The only two pieces of information that the network administrator knows about the firewall are the management interface MAC address, which is 01:4a:d1:fa:b1:0e, and the administrator's password. Which of the following will allow the administrator to log onto the firewall via HTTPS if the management's IP address is unknown and the administrator's workstation IP address is 192.168.0.10/23?
Run the following command on the administrator's workstation: arp -s 192.168.1.200 01:4a:d1:fa:b1:0e
A company has changed ISPs for their office and ordered a new 250 Mbps symmetrical Internet connection. As a result, they have been given a new IP range. The ISP has assigned the company 10.10.150.16 /28. The company gateway router has the following interface configuration facing the ISP: Interface A: IP address: 10.10.150.16 Subnet mask: 255.255.255.240 Default gateway: 10.10.150.32 Speed: 1000 Mbps Duplex: Auto State: No Shutdown None of the workstations at the company are able to access the Internet. Which of the following are the reasons? (Select TWO).
The default gateway is configured incorrectly & The router interface is configured with the incorrect IP address
A network technician has been called to fix a computer with the error message of "Destination Host Unreachable". This is a new employee's laptop that is not connecting to the Internet from the office. Which of the following is the MOST likely cause of this issue?
The gateway is misconfigured on the new router
A network technician is 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 connects the two 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 of this action?
The interface status will show line protocol down
Which of the following is the MAIN purpose of a packet sniffer?
To analyze network traffic
What can be used to locate the position in a cross connection?
Toner probe
John, the network technician, is troubleshooting a network issue by implementing a new security device. After installing and configuring the device, which of the following steps should he take NEXT?
Verify full system functionality
Joshua, a user, is having difficulty connecting a laptop to the company's wireless network. The technician determines Joshua's wireless NIC has failed and replaces it. Which of the following network troubleshooting methodology steps should the technician do NEXT?
Verify full system functionality
Once Karl, a technician, has implemented the solution to a user's reported problem, which of the following should Karl do NEXT?
Verify full system functionality
A network technician has received comments from several users that cannot reach a particular website. Which of the following utilities will product the results printed below? Tracing route to 172.30.9.78 over a maximum of 30 hops 1 <1 ms <1 ms 172.30.0.78
tracert
A technician is troubleshooting a network data transmission issue. Which of the following commands would the technician be able to use to identify the location of the packet loss?
tracert
