An Introduction To Email Servers by Marcus Peterson
To send e-mail, you need to connect to the Internet and an e-mail application, such as Microsoft Outlook Express or Eudora. The e-mail application connects to your mail server that can forward your mail. The standard protocol used for sending Internet e-mail is called SMTP, an acronym for Simple... It works in conjunction with a POP3 (Post Office Protocol) server or an IMAP (Internet Mail Access Protocol) server, which are used to receive e-mails. ... The server looks at the e-mail address (like the address on an envelope), then forwards on it to the recipient's mail server using an...

Cisco CCNP / BCSI Exam Tutorial: Broadcasts And The IP Helper-Address Command by Chris Bryant
While routers accept and generate broadcasts, they do not forward them. This can be quite a problem when a broadcast needs to get to a device such as a DHCP or TFTP server that's on one side of a router with other subnets on the other side. If a PC attempts to locate a DNS server with a... A.B.C.D IP destination address R1(config-if)#ip helper-address 100.1.1.2 Now, you may be wondering if this command covers all UDP services. ... Additionally, to remove protocols from the default list, use the no ip forward-protocol command.

IP Addresses: Finding, Understanding and Using by Adam Knife
IP addresses are like real-world addresses, they are identifiers for computers or devices connected to TCP/IP networks. The entire TCP/IP networking protocol is based on the concept of a unique IP address for every object connected to the network. Messages sent via TCP/IP networks are routed to... Private networks, such as internal LANs can have any IP addresses they want as long as each is unique, however, to connect to the public and regulated Internet, you will need to use a registered IP address (distributed by the various Internet registries: ARIN, RIPE, etc.) The number of available...

Internet Connection Sharing in Windows XP by Antonio Fabrique
This articles explains in detail how to set up a small network at home so you can share your Internet connection between two computers running Windows XP. Sharing the Internet connection between two computers running WIndows XP Connect the first one of your computers (the server) to the... After you're done with the wizard right click on the Connection and choose Properties -> select Internet Protocol (TCP/IP) and click the "Properties" button -> make sure that Obtain an IP address automatically and the Obtain DNS server address automatically check boxes are selected.

VPN by Kent Pinkerton
A virtual private network or VPN is a network that is used to connect nodes. It is constructed using public wires. Many systems enable users to create a network using the Internet. The Internet is used as a means of transporting data. Security mechanism such as encryptations and others are used... It is a private network that uses a public network such as the internet to connect remote sites or users together. ... This protocol sends the data through a ""virtual tunnel"", It encrypts the data before sending it and decrypts it on receiving it at the other end.

Read This And Understand Why Your Internet Access Is Sometimes Slow by Tayo Solagbade
Do you know what happens when you type a web address or URL (like www.torjtechnology.com) into your Internet Explorer browser's URL entry bar, and click "GO" or press "Enter"? ----------------------------------------------------- Note: URL means "Uniform Resource Locator" and is the address... It actually represents a unique string of numbers called an Internet Protocol(IP) address e.g 164.205.65.105. ... Internet Explorer sends the web address(www.torjtechnology.com) to your ISP(Internet Service Provider).

Introduction Of Computer by Lalit Bansal
Internet and Networks Computer network is a group of computers linked together, so that they can share information and resources. Internet is “network of networks”. It can also be described as information highway. It is the world’s largest network of computers. ... The internet layer defines a protocol called IP (Internet Protocol) to specify an official packet format. ... TCP/IP: TCP (Transmission Control Protocol) and IP (Internet Protocol) are the two types of protocol. ... WWW uses HTTP (Hypertext Transfer Protocol) as its underlying protocol.

Wireless Networking - Router Vs Access Point by Eric Meyer
While planning for your wireless network you might be asking what is the difference between a router and an access point. You need to think of a router as more of a server because it performs many functions like a server. An access point only provides a portal for wireless client to connect to... Because you have multiple computers connected to your router the router uses a protocol called NAT {Network address translation} NAT will assign the computers that are behind your routers IP address, private IP addresses.

ARP, MAC, Poisoning, & WiFi by Brian Wilson
In this paper we will cover the basics on Address Resolution Protocol (ARP), Media Access Control Addresses (MAC), Wireless (WiFi), and layer 2 communications. I hope to explain how a “Man in the Middle Attack” works. The common name for this is ARP poisoning, MAC poisoning, or Spoofing. ... The Address Resolution Protocol is used to dynamically discover the mapping between a layer 3 (protocol) and a layer 2 (hardware) address. ... Ethernet addressing uses a unique, 48-bit address called its Ethernet address or Media Access Control (MAC) address.

Cisco CCNA Exam Tutorial: Mapping The OSI Model To The TCPIP Model by Chris Bryant
The OSI model is the model that most networking personnel are familiar with, but to earn your CCNA, you need to know the OSI model, the TCP/IP model, and how the two map to each other. The four layers of the TCP/IP architecture can be compared to certain levels of the OSI model. ... This layer is also referred to in the TCP/IP model as the Internet layer. ... It’s important to know what each level of the TCP/IP protocol architecture does, and how these layers map to the OSI model. ... The two layers do much the same thing.