- Inet 2 7 – Displays Info About Local Network Connections Inc
- Inet 2 7 – Displays Info About Local Network Connections List
Configuring the Network 5.1.1. On the Desktop with NetworkManager. In a typical desktop installation, you’ll have NetworkManager already installed and it can be controlled and configured through GNOME’s control center and through the top-right menu as shown in Figure 5.1, “Network Configuration Screen”. By combining the advanced technology of HDMI over LAN with Monitors AnyWhere Connect, digital signage has become simple and cost-effective: A single computer with a local area network connection is all you need to push your content onto a large number of screens simultaneously.
-->[Internet Connection Firewall may be altered or unavailable in subsequent versions. Instead, use the Windows Firewall API.]
TheINetConnection interface provides methods to manage network connections. Remote wake up 1 3 14.
Inheritance
The INetConnection interface inherits from the IUnknown interface. INetConnection also has these types of members:
Methods
The INetConnection interface has these methods.
Method | Description |
---|---|
INetConnection::Connect | The Connect method connects, or establishes, this network connection. |
INetConnection::Delete | The Delete method deletes this connection from connections folder. |
INetConnection::Disconnect | The Disconnect method disconnects this connection. |
INetConnection::Duplicate | The Duplicate method creates a duplicate of this connection in the connections folder. |
INetConnection::GetProperties | The GetProperties method retrieves a structure that contains the properties for this network connection. |
INetConnection::GetUiObjectClassId | The GetUiObjectClassId method retrieves the class identifier of the user interface object for this connection. |
INetConnection::Rename | The Rename method renames this connection. |
Requirements
Minimum supported client | Windows XP [desktop apps only] |
Minimum supported server | None supported |
Target Platform | Windows |
Header | netcon.h |
See also
When you invoke netstat with the–r flag, it displays the kernel routing tablein the way we've been doing with route. Onvstout, it produces:
The –n option makes netstatprint addresses as dotted quad IP numbers rather than the symbolichost and network names. This option is especially useful when you wantto avoid address lookups over the network (e.g., to a DNS or NISserver).
The second column of netstat 's output showsthe gateway to which the routing entry points. If no gateway is used,an asterisk is printed instead. The third column shows the“generality” of the route, i.e., the network mask for thisroute. When given an IP address to find a suitable route for, thekernel steps through each of the routing table entries, taking thebitwise AND of the address and the genmask before comparing it to thetarget of the route.
The fourth column displays the following flags that describe the route:
The route uses a gateway.
The interface to be used is up.
Only a single host can be reached through the route. For example, this is thecase for the loopback entry 127.0.0.1.
Thisroute is dynamically created. It is set if the table entry has beengenerated by a routing daemon like gated or by anICMP redirect message (see the section Section 2.5” in Chapter 2).
Thisroute is set if the table entry was modified by an ICMP redirectmessage.
The route is a reject route and datagrams will be dropped.
The next three columns show the MSS, Window and irtt that will beapplied to TCP connections established via this route. The MSS is theMaximum Segment Size and is the size of the largest datagram thekernel will construct for transmission via this route. The Window isthe maximum amount of data the system will accept in a single burstfrom a remote host. The acronym irtt stands for“initial round trip time.” The TCP protocol ensures thatdata is reliably delivered between hosts by retransmitting a datagramif it has been lost. The TCP protocol keeps a running count of howlong it takes for a datagram to be delivered to the remote end, and anacknowledgement to be received so that it knows how long to waitbefore assuming a datagram needs to retransmitted; this process iscalled the round-trip time. The initial round-trip time is the valuethat the TCP protocol will use when a connection is firstestablished. For most network types, the default value is okay, butfor some slow networks, notably certain types of amateur packet radionetworks, the time is too short and causes unnecessaryretransmission. The irtt value can be set using theroute command. Values of zero in these fields meanthat the default is being used.
Finally, the last field displays the network interface that this routewill use.
5.9.2. Displaying Interface StatisticsWhen invoked with the –i flag,netstat displays statistics for the networkinterfaces currently configured. If the –aoption is also given, it prints all interfacespresent in the kernel, not only those that have been configuredcurrently. On vstout, theoutput from netstat will look like this:
The MTU and Met fields show thecurrent MTU and metric values for that interface. TheRX and TX columns show how manypackets have been received or transmitted error-free(RX-OK/TX-OK) or damaged(RX-ERR/TX-ERR); how many weredropped (RX-DRP/TX-DRP); and howmany were lost because of an overrun(RX-OVR/TX-OVR).
The last column shows the flags that have been set for this interface.These characters are one-character versions of the long flag namesthat are printed when you display the interface configuration withifconfig:
Inet 2 7 – Displays Info About Local Network Connections Inc
A broadcast address has been set.
This interface is a loopback device.
All packets are received (promiscuous mode).
ARP is turned off for this interface.
This is a point-to-point connection.
Interface is running.
Interface is up.
5.9.3. Displaying ConnectionsInvoking netstat -ta onvlager produces this output:
This output shows most servers simply waiting for an incomingconnection. However, the fourth line shows an incoming SMTP connectionfrom vstout, and the sixthline tells you there is an outgoing telnetconnection to vbardolino.[1]
Using the –a flag by itself will display allsockets from all families.
Notes[1] You can tell whether a connection isoutgoing from the port numbers. Liquibid video exposure and effects 1 2 3 0. The port number shown for thecalling host will always be a simple integer. Onthe host being called, a well-known service port will be in use forwhich netstat uses the symbolic name such assmtp, found in /etc/services.