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1.1 Network Overview
term we need to understand what the network is a network, for this term refers to a scope of interpretation, the network primarily refers to the short and long distances along joined to the computer all the components involved (hardware and software). Network used to provide easy access to message, increase productivity for users.
we will argue in this partition some of the components contained in networking, as well as because linkage, including computer networking equipment, including elementary topology types.
1.1.1 Network features
in network design and ongoing maintenance should be thought in the emulating characteristics.
costs: including network components, installation and ongoing upkeep costs.

security: including the conservation of network components and components involved among the data,PULSERA NEGRA CON BANDERA, as well,XB 2011, or data transfer between components.

Speed: including network data transfer speed between the endpoint (data rate).

topology: The physical layout and routing of data among components of the logical shakes.

Scalability: the meaning of network adaptability to current growth, including new users. Applications and network components.

Reliability: definition of network components and the reliability of the connection between components. MTBF (Mean time between failures, MTBF) is often used to denote the likelihood of component failure.

availability: measuring if it can be used with the main network, deserving to power outages or intended maintenance and lead to a network is not there, then known as downtime. Availability is usually based on the aggregate number of minutes a annual to enumerate the percentage terms. Therefore, the customary operatiin due time is the number of minutes you can use the network divided by the absolute number of minutes a year.
test points: the design and maintenance of networks to reserve in mind these factors: cost, safety, speed, topology, scalability, reliability and availability.

after we memorize the above points in idea when designing the network in the practical application requires detailed inquiry of price, safety, speed,PULSERA CAMUFLAJE CON LOGO XB, topology, scalability, reliability and availability, and effect a poise between these ingredients. Each network is different, so the chart solution applies only to a definite location.
1.1.2 component
Glossary
application: It is an of the major components of networking, which allows users to complete manifold missions. Many applications can sense the network. These applications are not granted to way and use resources on the regional computer. Such as FTP, WEB and so on.
protocol: used to implement the application. Some protocols are open criteria, method namely numerous contractors to amplify interoperable applications, other protocols are proprietary,PULSERA TRANSPARENTE CON BANDERA, averaging namely the agreement can only be accustomed for characteristic applications. Such as: Simple Mail Transfer Protocol (Simple Mail Transfer Protocol, SMTP), Internet Message Access Protocol version 4 (Internet Message Access Protocol Version 4, IMAP4) and Post Office Protocol 3 (Oost Office Protocol3, PoP3), Pop3 e-mail can be, such as Sendmail and Microsoft Exchange; file transfer protocol (File Transfer Protocol, FTP) file transfer program can be fulfilled, such as Ftp Explorer, etc.; Hyper Text Transfer Protocol (Hypertext Transfer Protocol, HTTP), Web browsing applications can be realized,PULSERA BLANCA CON NETHERLANDS, such as Internet Explorer, etc. and Web server applications, such as Microsoft's Internet Information Services (Internet Information Services, IIS) and Apache.

some petitions such as e-mail agenda to only use quite tiny bandwidth, and additional applications such as export software, video software, and file convey software,PULSERA NEGRA CON ARGENTINA, you absence very lofty bandwidth. Some applications are running while the real, such as IP voice (Voice Over IP, VOIP) and video en This is sprint interactively, such as immediate messaging or database queries, and some are run in batch mode, only very mini consumer intervention. Today's webs need apt be proficient to accommodate always these another types of resources and applications, including, along to their particular requirements, such as the transmission bandwidth of soft large content, or VoIP, and video delay and the minimum required lag. Usually combined with the quality of service (Quality of service, QoS) traits to encounter these requirements.

exam focus
VoIP and video streams are very emotional to the delay and delay. Therefore, usually at implementing QOS to do anybody of these applications have ample network bandwidth and relevance in higher precedence, accordingly restricting the number of casualties delay.

to construct a network, you need 3 types of components: computers, networking equipment and media. Computer components are corrected running Microsoft windows, Macintosh OS, UNIX (including Linux), or other operating systems (responsible for the application to the user) equipment, such as PC, and file servers. Networking makeup is such as hubs, bridges, switches, routers, firewalls, telegraph access points, modems, NT1 (an ISDN network extremity equipment) and the letter of the 1st service unit / data service element (ChannelServiceUnited, DataServiceUnited, CSU, DSU), they are responsible for transmission of information between computers.

test points
safety equipment is specialized network components, typically invest a lot of safety features such as Cisco's ASA and PIX, Ciscor 4200 intrusion hindrance and revelation system (IPS and IDS), and Cisco's 3000 VPN concentrator.

medium (such as copper or fiber) is used to connect computers and networking equipment, so that information can be shared between the different components. Wireless communications will too belong to that classification.