Networking

Before you start Objectives: Learn about different technologies and services which can be utilized to connect to the WAN. Prerequisites: You have to know what a WAN is, and why it is used. Key terms: WAN, PSTN, ISDN, ATM, Frame Relay, SONET, MPLS  Public Switched Telephone Network (PSTN) To connect one site (location) to another, over WAN, we … Read more Overview of WAN Access Technologies

Before you start Objectives: Learn about different parts of WAN, how we call them, who is responsible for which part of the WAN, and about different methods to send data in WAN. Prerequisites: no prerequisites. Key terms: WAN, structure, Packet Switching, Circuit Switching, organization  WAN Components Organizations often rely on (contract with) Service Providers who have the necessary … Read more WAN Organization and Structure

Before you start Objectives: learn what is WAN, why it is used, and which cabling and signaling methods can be used in WANs. Prerequisites: no prerequisites. Key terms: WAN, T1, T3, E1, E3, J1, J3, OC, cabling, speed  What is WAN WAN is used to connect two or more networks over a long distance. The first thing we … Read more Introduction to Wide Area Networks

Before you start Objectives: Learn which configuration options are required in order to set up wireless network properly. Prerequisites: you should know about wireless networks in general. Key terms: wireless, network, SSID, access, configure, wap, beacon, NIC, WPA Configuring Wireles Access Point (WAP) The first thing we need to do is to configure the WAP. Most WAPs will … Read more Configuring Wireless Networks in General

Before you start Objectives: Learn what is infrared wireless connection and its specifics, and what is Bluetooth and its specifics. Prerequisites: no prerequisites. Key terms: Bluetoots, devices, Infrared, mode, light, signal, uses, distance, IrDA, network, PAN, wireless  Infrared (IrDA) Infrared technology uses light waves that are just passed the visible light spectrum. The light used comes from three … Read more Overview of Infrared (IrDA) and Bluetooth Standards

Before you start Objectives: Learn about common authentication types and security implementations used in wireless networks today. Prerequisites: no prerequisites. Key terms: key, wireless, authentication, WPA, encryption, security, network, WEP, AP, server Security First wireless networks were not very secure. Trough time, security of wireless networks has improved. To protect our wireless network we must configure authentication and … Read more Wireless Security

Before you start Objectives: Learn about different wireless standards and their specifics, including 802.11n. Prerequisites: no prerequisites. Key terms: 802.11n, channels, network, standards, wireless, frequency, range, devices, GHz Standards The wireless standards that we are going to talk about here are 802.11a, 802.11b, 802.11g, and 802.11n. Different standards work on different frequency ranges. Frequency The reason why the frequency … Read more Overview of 802.11 Wireless Standards

Before you start Objectives: Learn the basics about frequencies, architecture, and media access method used in wireless networks. Prerequisites: you should know the types of network topologies used. Key terms: wireless, network, device, BSS, data, frequency, AP, topology, method, access Radio Frequency Radio Frequency waves replace physical wires as the medium which we use to transfer data on … Read more Introduction to Wireless Networking

Before you start Objectives: Learn what is VPN, why do we use it, and which tunneling and authentication protocols are used with VPN technology. Prerequisites: no prerequisites. Key terms: VPN, tunneling, security, protocols, authentication.  What is VPN Typically, private networks are not accessible from the Internet or other public networks, because firewalls will block all unrequested traffic. To … Read more Introduction to Virtual Private Network (VPN)

Before you start Objectives: Learn what is VoIP, why should we use it, and which protocols are associated with VoIP. Prerequisites: no prerequisites. Key terms: network, data, phone, VoIP, voice, digital, analog, IP, calls, protocols How Does VoIP Work Voice over IP is a protocol which can be used to send voice data over data network (packet switched … Read more Introduction to Voice over IP (VoIP)