Network Troubleshooting Flashcards
While troubleshooting a network issue, you successfully pinged the 127.0.0.1 IP address. Which of the following is true?
– The TCP/IP protocol suite is working correctly on the local computer
– The TCP/IP protocol suite is working correctly on the DNS server
– The TCP/IP protocol suite is working correctly on the DHCP server
– The TCP/IP protocol suite is working correctly on the default gateway
– The TCP/IP protocol suite is working correctly on the local computer
Which of the following commands verifies that the TCP/IP is working correctly on the local computer?
– netstat
– nslookup localhost
– ping 127.0.0.1
– ping -a localhost
ping 127.0.0.1
You’re designing an update your clients wireless network. The existing wireless network uses 802.11b equipment, which your client complains runs to sell. She wants to upgrade the network to run at 150 Mb per second game to budget constraints, your client wants to upgrade only the wireless access point in the network this year. Next year, she will upgrade the wireless network boards in her users workstations. She is also indicated that the system must continue to function during the transition. Which 802.11 standard will work the best in this situation?
–802.11n –802.11a –802.11b –802.11g –802.11d
802.11n
Your home network is connected to the Internet through a 512 Mb per second DSL line. Your ISP providing you with a small office home office router that provides for 100 Mb per second Internet ports for your home office and one DSL port for connecting the network to the Internet. The SoHo router has a built in DHCP server that is used automatically configure workstations with an IP address, default gateway address, and DNS server address. However, today you are unable to access the Internet. The browser reports that it cannot find the URLs that you are requesting. Using the ipconfig command, you verify that the workstation is receiving correct IP address parameters. You tried entering tracert 137.65.1.2 at command prompt and found that you were able to reach the server on the Internet without any issues. What is causing this problem?
– Your ISPs DNS server is down
– Automatic private IP addressing has assigned a non-routable IP address to your workstation
– Your ISPs DSL service maybe down
– The SoHo router isn’t working properly
– Your built-in DHCP server isn’t working properly
Your ISPs DNS server is down
You have a small wireless network that uses multiple access points. The network uses WPA and broadcast the SSID. WPA2 is not supported by wireless access points. You want to connect a laptop computer to the wireless network. Which of the following parameters will you need to configure a laptop? (Select two)
–BSSID – TKIP encryption – Channel – Pre-shared key – AES encryption
– TKIP encryption
– Pre-shared key
Your troubleshooting connectivity between your computer and the www.widgest.com server whose IP address is 192.1 68.1.1. Which of the following commands test the connectivity to the device as well as the resolution?
– Ping 192.1 68.1.1
– Ping www.widgets.com
– nslookup 192.168.1.1
– nslookup www.widgets.com
Ping www.widgets.com
You managing network that has multiple internal subnets. You connecting workstation to the 192.1 68.1.0 subnet which uses the default subnet mask. This workstation can communicate with some post on the private network, but not with other house. You run the ipconfig /all and see the following:
Ethernet adapter local area connection: Connection specific DNS suffix . : mydomain.local Description: Broadcom network adapter Physical address: 00-AA-BB-CC-74-EF DHCP Enabled: No Autoconfiguration enabled: Yes IPv4 Address: 192.168.1.102 Subnet mask: 255.255.0.0 Default Gateway: 192.168.1.1 DNS servers: 192.168.1.20 192.168.1.27
What is the most likely cause of the problem?
– Incorrect IP address
– Incorrect DNS server address
– Incorrect subnet mask
– Incorrect default gateway
Incorrect subnet mask
You have a small home office that uses 192.1 68.1.0 with the default subnet mask for the network address. The default gateway address is 192.1 68.1 .234, and the router is provided DHCP on the network. The Wrk2 Peter has been assigned IP address of 192.1 68.1 .55. Which of the following is considered the loopback address for the Wrk2 computer?
- 127.0.0.1
- 192.168.1.55
- 192.168.1.255
- 192.168.1.0
192. 168.1.254
127.0.0.1
You are troubleshooting a network communication problem to the www.widgets.com server. Which of the following will give you the IP address of that server? (Select two)
- nslookup www.widget.com
- ipconfig www.widgets.com
- ping www.widgest.com
- ipconfig /all
- nslookup www.widget.com
- ping www.widgest.com
Given that your Windows workstation has automatic private IP address and implemented using default settings, which of the following TCP/IP addresses could be automatically assigned to the system should your DHCP server go down or become inaccessible?
- 172.16.1.26
- 169.254.1.26
- 169.198.1.23
- 10.0.0.65
- 192.168.1.22
- 168.254.10.25
-169.254.1.26
You have a small wireless network with less than 50 client computers. You upgrade the hardware onto wireless devices so that you can use a better security standard than WEP. That you need to implement new security standard. You need the greatest amount of security with the least amount of effort, without replacing any of the wireless infrastructure. What should you do? (Select two)
– Implement WPA2 AES
– Implement WPA2-Enterprise
– Configure each client to use a different key
– Configure each client with the same key
– Implement WPA-PSK
– Implement WPA2 AES
– Configure each client with the same key
Which wireless standard have the highest data transfer rates?
- 802.11b
- 802.11g
- 802.11a
- 802.11n
802.11n
You managing network that has multiple internal subnet. You connect the workstation to the 192.1 68.1.0 subnet using the default subnet mask. This workstation can communicate with some hosts on the private network, but not with other hosts. You run ipconfig /all and see you the following:
Ethernet adapter local area connection: Connection specific DNS suffix . : mydomain.local Description: Broadcom network adapter Physical address: 00-AA-BB-CC-74-EF DHCP Enabled: No Autoconfiguration enabled: Yes IPv4 Address: 192.168.1.102 Subnet mask: 255.255.255.0 Default Gateway: 192.168.2.1 DNS servers: 192.168.1.20
What is the most likely cause of the problem?
– Incorrect IP address
– Incorrect subnet mask
– Incorrect default gateway
– Incorrect DNS server address
Incorrect default gateway
You administrate network with Windows and Linux servers, and Windows 7 clients. A user called and indicates that he is unable to access resources on the network. You type ipconfig on the users computer and receive the following output:
Ethernet adapter local area connection:
IPv4 Address: 192.168.1.102
Subnet mask: 255.255.255.0
Default Gateway:
You check your NIC and see link link light on. What might the problem be?
– Misconfigured DNS server – Unavailable DHCP server – The user change the configuration of the computer – Missing default gateway – Bad NIC
Unavailable DHCP server
A user reports that he can’t browse to a specific website on the Internet. From his computer, you find that a ping test to the Web server succeeds. A trace route test shows 17 hops to the destination Web server. What is most likely the cause of the problem?
– Incorrect subnet mask value
– Duplicate IP addresses
– Incorrect default gateway addresses
– Incorrect DNS server addresses
Incorrect DNS server addresses
