If you're truly experiencing a DNS issue, your system will not be able to resolve host names (Google.com) into IP addresses (74.125.225.78) which is what your computer really uses to communicate.
A simple test to verify that this is the case is to go to your terminal and ping a host name and then try to ping an ip address (on the internet). If you're able to ping the IP address and not the FQDN then you've got yourself a DNS issue because your DNS provider is not translating that name to an IP.
I suggest using either Google DNS or OpenDNS, both of which are offered free of charge.
Here's the original answer by Ashlee:
go into your operating system command prompt and attempt to do a
nslookup for a domain such as Google it should return a ip address
if it does not it is most likely a dns issue
to check for network issues use the ping command to ping a website and trace route command to trace the route to the ip address
subnet mask
Hosts
A dnsmaq is a lightweight and easy to configure the DNS forwarder and also the DHCP server. It is aimed to design and provide a DNS and also a DHCP to a small network.
In Microsoft Windows Server 2003, you run the ipconfig /displaydns command to display the content of the DNS resolver cache. However, the results are incomplete. When this problem occurs, you do not receive a message.This problem occurs if there are too many entries in the DNS resolver cache. Typically, this problem occurs when there are too many custom entries in the Hosts file.This problem occurs when an allocated buffer is not large enough to contain all the contents of the DNS resolver cache. When the Ipconfig.exe tool allocates memory, it does not consider the DNS entries in the Hosts file.LINK Below
To scan a network for DNS servers, you can use a network scanning tool such as Nmap or Fing. Here are the steps to scan for DNS servers using Nmap: Install Nmap on your computer if you haven't already. You can download Nmap from the official website. Open a command prompt or terminal window. Enter the following command: nmap -sU -p 53 --open [IP range] Replace [IP range] with the range of IP addresses you want to scan. For example, if you want to scan all IP addresses on the 192.168.0.x subnet, you would enter nmap -sU -p 53 --open 192.168.0.0/24. Press Enter to run the command. Nmap will scan the specified IP range for open ports on UDP port 53, which is the port used by DNS servers. Once the scan is complete, Nmap will display a list of IP addresses that have an open DNS port. Alternatively, you can use Fing, which is a mobile app that can scan a network for connected devices and display information about them, including their DNS servers. To scan for DNS servers using Fing, follow these steps: Install Fing on your mobile device from the app store. Open the app and tap on the "Devices" tab. Tap on the "Scan" button to scan the network for connected devices. Once the scan is complete, Fing will display a list of devices on the network. Tap on a device to view more information about it, including its IP address and DNS server.
Check your network connections. That is usually a main problem of not communicating with either DNS or DHCP on a LAN.
A forwarder is a Domain Name System (DNS) server on a network used to forward DNS queries for external DNS names to DNS servers outside of that network. You can also forward queries according to specific domain names using conditional forwarders.A DNS server on a network is designated as a forwarder by having the other DNS servers in the network forward the queries they cannot resolve locally to that DNS server. By using a forwarder, you can manage name resolution for names outside of your network, such as names on the Internet, and improve the efficiency of name resolution for the computers in your network. For more information about forwarders and conditional forwarders
DNS Servers
DNS servers
No
They are network services that are always on listening on the network for requests. Example: DNS, DHCP ..... DNS resolves Domain Names to IP addresses. DHCP assigns dynamic IP addresses.
client/server network
A DNS address is the address to a server that converts a URL to an IP address. Most DNS address' are provided by your ISP, although there are many free DNS servers available.
Go to your network connection and select your local network - properties, Internet Protocol (TCP/IP) - prperties. Select "Use the following DNS server addresses" and enter the desired DNS server.
Nslookup.exe - The Windows 7 command-line utility that enables you to generate DNS request messages and then transmit them to specific DNS servers on the network is called __________.
DNS is a must for any PC in a network To resolve IP to name and vice versa to access any resource in the network like printer,PC, server etc
DNS