Networking with TCP/IP
Link-Layer Topology Discovery Mapper I/O Driver
Allows your computer to discover and locate other computers and devices on
the network. Also used to determine the available network bandwidth.
Link-Layer Topology Discovery Responder
Allows your computer to be discovered and located by other computers and
devices on the network.
Although you will probably use only IPv4 on your home or small-office network, you
should understand how IPv6 works and be able to configure the protocol. You can
manually assign IPv4 and IPv6 addresses using static IP addresses, or automatically
assign them using dynamic IP addresses. You configure the IPv4 and IPv6 protocols
in exactly the same way, with the following exceptions:
• IPv4 uses subnet masks, and IPv6 uses subnet prefix lengths.
• IPv4 uses both DNS and WINS for locating computers and devices on the net-
work, and IPv6 uses only DNS.
• IPv4 allows for automatic private IP addressing if a DHCP server cannot be
located, and IPv6 simply assigns the computer a local–local unicast (private) IP
address based on the MAC address of the network adapter.
On a per-network-connection basis, you can configure the networking protocols
used by completing the following steps:
1. Click Start, and then click Control Panel.
2. In the Control Panel, click Network and Internet and then click Network and
3. In the Network and Sharing Center, click “Manage network connections” under
Tasks. This opens the Network Connections window.
4. Right-click the network connection you want to configure and then select Prop-
erties. This displays a Properties dialog box, as shown in Figure 14-11.
5. On the Networking tab, you can use the checkboxes provided to manipulate the
different protocols associated with the network adapter. You can turn the differ-
ent protocols on and off by clicking the checkbox associated with each protocol:
• If you are using file and printer sharing on your network, you must enable
both Client for Microsoft Networks, and File and Printer Sharing for
Microsoft Networks. The QoS protocol offers greater flexibility in the flow
of data by prioritizing the different requests made by the client.
• If you are using the IPv6 protocol for connectivity, you also must use the
QoS Packet Scheduler, which Windows selects by default. If you are not
using this protocol, you should disable it by unchecking the box associated
with this protocol.
• If you are using the IPv4 protocol for connectivity, you must leave the Inter-
net Protocol Version 4 (TCP/IPv4) box checked.