900MHz Best practices forering WAN Solutions
The first two parts of this series will discuss practical methods for increasing WAN bandwidth on your environment and discussing different methods for providing high availability. We will go over some best practices for selecting a wide area network and managing it like a utility network.
The most common method for manipulating a WAN is to use an HTTP proxy server. In part one I will discuss this and how it improves functionality and availability.
The Problem with HTTP
Since its inception in 1999, the HTTP protocol has been a great convenience for web development and users. However, this convenience can have a downside. HTTP is a Turing complete language. downtimes, errors, and concurrency are all part of a HTTP evaluation. All of these parts make predicting and monitoring the network an elusive task.
Pros-Easy to use.
Once installed, a HTTP proxy server does not require configuration. Many WAN optimization devices and services run off the server. This simplifies the system and the maintenance. Powerful WAN optimization devices can be installed by the numerous vendors.
A GPS device, for instance, may cost $500-$1000. A more recent GPS device may cost $1000. Note that the fee is per user and not a license fee.
SMTP stands for Simple Mail Transfer Protocol. This is a text based protocol that was originally designed for the Internet thirty years ago. Today it is most commonly used for exchanging mass emails.
Once installed, SMTP is easy to use. Users can easily send and receive emails. The account must be registered before you can send emails, and you need not be a technical wizard to use it.
SMTP is a basic protocol. The most functionality it provides is sending and receiving emails between a computer and a host server. It includes a basic procedure for sending and transferring emails. Although it is easy to use, SMTP can be basic to understand. You’ll have to know a few basic concepts to use this protocol.
Transport Layer protocols like TCP/IP are build at the network level. They are typically understood by users at a network level. This means that you probably will not be able to use it with your host applications. These protocols are used between network applications and the OSI layers. The SMTP protocol is important to understand because it affects all the other protocols that are used between these layers.
There are five protocols that make up the TCP/IP protocol suite. They are VTP, POP, QUOT, PTP, and TELNET.
The VTP protocol is part of the IP (Internet Protocol) family of protocols that sit on the level of the network. It provides end-to-end connectivity services. 4 protocols comprise of the VTP suite. They include PTP, SSTP, CRLP, and IS-3 1200.
Pros-Easy to understand.
-Can be used with P2P networks very well.
-Many operating systems support this protocol. Windows 2000, Windows 2003, Windows NT, and Mac OS 10.2 all support SMTP.
– decay in bandwidth with each account can slow the rate slightly.
– Can’t be used with some file sharing applications.
The VTPp protocol is a fast, robust protocol that can be used to precisely measure SMTP traffic and provide a reliable data delivery method. The SMTP server processes each SMTP packet and responses in the form of a stream of ASCII text. It should be noted that several other protocols, notably RTPs, can be used to packetize voice traffic.
Pros-Can be used with any network.
-The SMTP server can be located anywhere in the world.
-The protocol is independent of any particular Internet service. This means that it can be used with any service that provides Internet access to the public. Note however that SMTP is only used by email and news servers. You cannot for example use it to transfer files between different computer systems.
Cons-Expensive. Upgrading to the latest version costs ten times more than protocol A.
-Needs many back-end systems for error handling and monitoring.
-itters about the number of back-end systems.
-Basicly limits the number of back-end systems.
This product has a major advantage that it is simple to use. The SMTP server can simply be configured to operate with one particular SMTP account and without the need for any back-end accountancy. This also allows you to run at a very low start-up cost.
The disadvantages of the SMTP server
The shortcoming of the SMTP server is that it is not a secure basic service.