11.8.14 PQ NET 126

A user reports that they cannot browse to a specific website on the internet. From their computer, you find that a ping test to IP address of the web server succeeds. A tracert test shows 17 hops to the destination web server. What is the most likely cause of the problem?

Incorrect DNS server address In this scenario, a ping test to the IP address of the website succeeds, while accessing the website through the browser does not work. Users type hostnames in the browser to go to websites, and hostnames must be translated to IP addresses by a DNS server.

Match each utility on the left with its corresponding description on the right. (Each utility may be used once, more than once, or not at all.)

Resolves (looks up) a speficied hostname's IP address. nslookup Tests connectivity between devices and shows the routers in the path between the two devices. tracert Sends an ICMP echo request/reply packet to a remote host. ping Displays current connections and incoming and outgoing connections. netstat A few simple replies to this request from the remote host indicates that a connection exists between sender and receiver. ping Displays active sessions, ports, sockets, and the local routing table. netstat Performs a continuous connection test when used with the -t option. ping

Examine the following output: 4 22 ms 21 ms 22 ms sttlwa01gr02.bb.ispxy.com [154.11.10.62] 5 39 ms 39 ms 65 ms plalca01gr00.bb.ispxy.com [154.11.12.11] 6 39 ms 39 ms 39 ms Rwest.plalca01gr00.bb.ispxy.com [154.11.3.14] 7 40 ms 39 ms 46 ms svl-core-03.inet.ispxy.net [205.171.205.29] 8 75 ms 117 ms 63 ms dia-core-01.inet.ispxy.net [205.171.142.1] Which command produced this output?

The output is from a TRACERT command run on a Windows Server system. The tracert command provides information on each step in the route that a packet takes to reach a remote host. Responses from each hop on the route are measured three times to provide an accurate representation of how long the packet takes to reach and return from that host. This information can be useful in locating congestion points on a network or when verifying that network routing is operating as expected.

You are troubleshooting network connectivity issues on a Windows workstation. Which command would you use to view the network adapter's MAC address?

ipconfig /all

You need to view detailed IP configuration information on your Windows workstation. In addition to the IP address, subnet mask, and default gateway configuration, you need to see the network card's MAC address and the addresses of the DHCP and DNS servers the workstation is communicating with. Which command would you enter at the command line to see this detailed information? When you see the DNS server address, you realize that this information needs to be updated. Earlier in the day, you implemented a new DNS server with a new IP address. The workstation will update this information in 24 hours. Which command can you enter at the command line to update the DNS server information right away?

ipconfig /all ipconfig /flushdns

You are the computer specialist for a small business. Your company server is named FS1 and has an IP address of 10.0.0.2. The hardware in your company server has started to experience intermittent failures, so you transfer the shares on the server to a spare server and take the main server offline. The spare server has an IP address of 10.0.0.3. You edit the existing A record for FS1 on your company's DNS server and redirect the hostname to the spare server's IP address of 10.0.0.3. Afterward, most users are able to access the shares on the spare server by hostname, but several users cannot. Instead, they see an error message indicating that the FS1 server cannot be found. Enter the command you can run from Command Prompt on these workstations that will allow them to access the shares on FS1 without performing a full restart.

ipconfig /flushdns

You are troubleshooting network connectivity issues on a workstation. Which command would you use to request new IP configuration information from a DHCP server?

ipconfig /renew

Which utility can you use to view a computer's current connections, active sessions, and ports?

netstat

You work in an office that uses Linux and Windows servers. The network uses the IP protocol. You are sitting at a Windows workstation, and an application you are using is unable to connect to a Windows server named FileSrv2. Which of the following commands would work BEST to test network connectivity between your workstation and the server? (Select two.)

ping tracert

You are the network administrator of a branch office for your company. The branch office network is part of a WAN that covers most of the United States. Users have been complaining that they are unable to access resources over the WAN at the main headquarters. You suspect that one of the routers between your office and the main headquarters is not working properly. Which of the following TCP/IP utilities would be BEST to use to troubleshoot the routers?

tracert shows you the series of routers that are used between the source and destination computers. If a router is not functioning, tracert can help you find which router is not working by showing you the last router the command was able to contact.