Did you know that the DNS client in Windows 7 (like the DNS server in Windows Server 2008 R2) supports DNS Security Extensions (DNSSEC) as per RFCs 4033, 4034, and 4035 to validate the integrity of DNS records? Windows Server 2008 R2 can validate that a DNS record was generated by an authoritative DNS server and that the DNS record has not been modified. This ensures the integrity of DNS responses.
The Windows Hosts file allows you to map IP addresses to host names, it is another method used in domain name resolution! For instance, the hosts file may become handy when your DNS servers are unavailable or data within these servers is incorrect. Also, it can help when new DNS records have not yet replicated to all DNS servers or when you need to test a copy of your website on a backup host. Although, you can use an IP address to directly contact a host, there are instances such as when connecting to web sites sharing a single IP address, where this is not possible.
The standard command-line tools we find in Windows 7 have full IPv6 functionality. Tools like Ping, Ipconfig, Pathping, Tracert, Netstat, and Route all support IPv6. Then we find tools specific to IPv6 which are provided in the Netsh command structure. But before we go for some troubleshooting tips, let’s check some mechanisms such as, IPv6 address resolution and configuration.
Windows 7 retains the same command-line tools of its predecessors for troubleshooting IP configurations. The most basic tools are the Ping and Ipconfig utilities which help you determine your system’s IP configuration and test connectivity. There are more advanced network tools such as, Tracert or Pathping, Nslookup for DNS related issues, etc. These help you troubleshoot advanced network related issues but this article will only cover the basic command-line tools which are adequate for the Windows 7 average users.
Before dealing with network configurations and troubleshoot network problems, it is important to have an understanding of the basic Network Services available in Windows 7. Network services such as, DHCP, DNS, APIPA and NAT are important network features that enable your computer to communicate with others. IPv4 configuration and operation relies on these services, which include:
Sharing the Internet connection over windows 7 requires one computer called the host that is connected to the Internet and to the rest of the computers on the internal network (LAN). Then the computers on the network connect to the Internet via the host computer. The host computer Internet connection can be wireless, modem (Ethernet or USB), 3G card or any similar device. To use ICS make sure that the LAN connection on each computer is configured to get an IP address automatically. This includes the LAN connection of the host computer.