ECHN stands for end-to-end connectivity, and it refers to the networking technology that can enable a company to send data from one end of its network to another using a computer network. The network is called the end-user network. In general, this means that the networks are separated by a firewall or other such security measures. Most companies have two networks – an internal network, which are usually local, and an external network, which are connected to the main network through a router.
The end-to-end connectivity between the different networks is done through an IP network. All IP network connections are private. They can be established between two computers over a public network or a private network. A computer with an internet connection sends and receives data packets that contain the IP addresses of the nodes within the network. Every IP packet contains a header that is used by the receiver in order to track the packet and reconstruct it back to the original destination.
The headers contain a number of fields. Each of these fields is used to indicate the source or destination of the packets and also the type of information contained within them. The first field is known as the Destination Field. This field indicates the physical address that is to be transmitted.
The next field is the Source Port Field. This is followed by the Destination Address, the Destination Port, the Time Stamp, the Protocol, the header type and any associated checksum. The last field is called Source Checksum.
If both the IP addresses of the source and the destination are known, then a match is made between the two addresses. If neither of them are known, then the match is made by looking up the IP addresses in the IP header. Once the match is found, then the packets are sent through the network. If the destination is known, then a routing table is generated in order to map the packets to their corresponding destinations. This process is known as forwarding.
There are two types of routing tables. They are dynamic and static. Dynamic routing tables are stored in a database, whereas static tables are maintained on the local computer. The two types of ECN maps will vary depending on the type of network that a business uses.
If an account ECN is used, then this mapping is done in order to create the network topology that is used to send data and messages between different servers. It is done by a number of processes. One such process is the routing table. Another is called the routing protocol, and the lastly there is a routing algorithm.
There are several steps involved in the account ECN mapping process. These include sending, receiving and forwarding of the data.
The sending process starts from the start. A router sends an ECN request by means of the Internet Gateway Device or IEGD. The IEGD receives this request and returns it either to the originating server or to the destination server, depending on the results received from the IEGD.
Receiving is quite simple. It starts when the message is received at the destination. The server then looks at the header to determine the destination IP addresses. and returns a response. The server sends the message to the source by means of the TCP connection.
The forwarding process is the next process. It is used to map the packet that has been received back to the source address and to send the packet from the source to the destination. The data is forwarded between the source and destination addresses by means of the routing table.
Every router processes the forwarding process by sending and receiving packets as well. In both the processes mentioned above, the router acts as the intermediary between the client and the server.