Computer Network Architecture
A computer network's design or structural and logical layout is called computer network architecture. It serves as a framework for defining a network's physical components, their functional organisation and configuration, as well as the guiding principles and practices to connect network devices, run the system, establish and follow communication protocols and rules for data transfer, and put security measures in place. Network architecture design can be approached in various ways, depending on the network's size and objective.
A Computer Network Architect, with expertise in computer engineering and thorough knowledge of their company or client’s business plan, is in charge of developing, building and deploying a variety of data communication networks, from small to extensive, for their companies or clients. In addition, these trained professionals oversee the installation of routers, cables, modems, and other required hardware and software, as well as troubleshoot any problems that may emerge to ensure that computer networks are operationally sound.
What Purposes Do Computer Networks Serve?
The range and means of interpersonal communication have received an enormous boost from computer networks. Networking uses diverse technologies to facilitate electronic communication via email, instant messaging, online chat, video calls and video conferencing. Authorised users can access information stored on other networked computers due to a network's capacity to allow the sharing of files, data and other forms of information. Distributed computing takes advantage of computing resources spread over a network to complete tasks. Users may also access and use shared resources and devices on the network, such as a printer or storage device.
Why Become a Computer Network Architect
The following are a few justifications for pursuing a career in computer network architecture:
- Competitive pay
- Positive employment outlook
- Challenging yet innovative work
Some Essential Characteristics of Computer Network Architects
In addition to the technical skills related to computer operations, wireless systems and security that Computer Network Architects acquire through education, training programs and on-the-job experience, certain other characteristics help them perform their work efficiently and effectively.
- Analytical Abilities: Network analysis is a necessary step for Computer Network Architects to troubleshoot networks and identify or develop optimal solutions to connect them, choosing the most suitable hardware, software and other tools, guided by organisational goals, needs and resources.
- Attention to Detail: Computer Network Architects must consider several factors when creating complex data communication networks. Paying close attention to detail ensures that they provide thorough and accurate designs to enable building networks that perform optimally.
- Human Skills: Computer Network Architects must collaborate with other IT specialists and organisational employees, also presenting plans and providing guidance to them, for which they need accurate and effective oral and writing skills and excellent interpersonal abilities.
- Leadership Capabilities: Once they have designed the network, Computer Network Architects may need to guide or lead a group of IT experts and computer hardware engineers through the process of building the network and other relevant activities, assigning them responsibilities and ensuring that the network functions properly.
- Organising Abilities: Computer Network Architects may oversee several and varied networks within a company and ensure their compatibility. Time management and strategic planning are two organisational abilities that help them keep projects on track and within the budget.
Types of Networks
- PAN (Personal Area Network): A personal area network connects personal computing devices, typically laptops, mobile phones, media players and play stations, across a range of about 30 feet or 10 metres. Personal area networks may be wired and use a USB or wireless running on WiFi and Bluetooth.
- LAN (Local Area Network): A local area network connects multiple network devices and systems within a defined and limited geographic area, such as a building or office. Numerous protocols are put in place to regulate the systematic, reliable and efficient exchange of data and services. Using less expensive components, such as hubs, network adapters and Ethernet cables, reduces the cost of a LAN. Data transfer is fast and relatively secure.
- MAN (Metropolitan Area Network): A metropolitan area network connects various LANs via a wired network, such as data cables, to create a larger network that serves a more extensive geographic area, such as a city. Therefore, the range of a MAN is greater than that of a LAN. Government organisations use a MAN to communicate with the public and business sector. RS-232, Frame Relay, ATM, ISDN, OC-3 and ADSL are some protocols frequently used in a MAN.
- WAN (Wide Area Network): A wide area network links devices over extended geographical areas, including states and nations. Much more extensive than a LAN or MAN, WAN links are wireless and depend on Ethernet cable, coaxial cable or a cellular radio signal. One of the largest WANs in the world is the internet. Businesses, governments, and educational institutions frequently use wide area networks.
IP (Internet Protocol) Address
A series of numbers separated by periods identifies the user’s city and state but does not reveal their actual address. Each address comprises a set of four numbers, with each number ranging from 0 to 255. Therefore, the range of IP addresses extends through all possible combinations from 0.0.0.0 to 255.255.255.255.
A series of numbers separated by periods identifies the user’s city and state but does not reveal their actual address. Each address comprises a set of four numbers, with each number ranging from 0 to 255. Therefore, the range of IP addresses extends through the various combinations possible from 0.0.0.0 to 255.255.255.255.
IP addresses are not randomly assigned. Instead, the Internet Assigned Numbers Authority (IANA), a division of the Internet Corporation for Assigned Names and Numbers (ICANN), a nonprofit organisation in the US, mathematically produces and allocates them.
Data Packets
A data packet is a unit of data made into a single package to travel on a particular network path. Data packets find usage in IP (Internet Protocol) transmissions that allow data navigation on the Web and other networks.
Modems, Routers, Switches, Gateways & Access Points
- A modem (modulator-demodulator) connects devices to the internet. It is a box connecting home networks or personal area networks (PANs) to the relevant internet service provider (ISP). Its function is to convert digital information from a computer into analogue signals that can be transmitted over wires and vice versa. The conversion occurs through the modulation and demodulation of electrical impulses sent through phone lines, coaxial cables or other wires.
- A router is located between a modem and a switch or hub and directs internet traffic to the correct networks. In other words, it joins networks and routes or directs the traffic between them. It is a box that allows wired and wireless devices to use an internet connection simultaneously and communicate directly with each other. It routes inter-device data and the data between the devices and the internet, using a packet’s IP address to route it to its destination.
- A switch connects devices within a single network. It transfers incoming and outgoing internet traffic between the devices connected on the network. An internet connection needs a router, but a switch is required only to connect devices. It sends data to the solitary device it is intended for (e.g., another switch, router or computer) but not to a network with multiple devices. A switch examines a data packet's MAC (media access control) address to identify the device it is meant to reach.
- A gateway is a device or node regulating traffic between two or more disparate networks. In other words, it translates communications or data packets from one protocol to another to connect dissimilar networks.
- A wireless access point (WAP) allows WiFi connectivity by sending and receiving data wirelessly over radio frequencies. In other words, it facilitates connecting wireless-capable devices to a wired network. WAPs offer a more convenient, secure, accessible and economical alternative to wires and cables and the flexibility to provide secure internet access to guest users via a password.
Current Scenario
The employment outlook of a particular profession may be impacted by diverse factors, such as the time of year (for seasonal jobs), location, employment turnover (when people leave current jobs), occupational growth (when new roles are created), size of the occupation, and industry-specific trends and events that affect overall employment.
The current demand for Computer Network Architects is high as businesses depend on internet connectivity and a communications infrastructure to function effectively and achieve their objectives. The demand for professionals who can design, build and upgrade network technologies is expected to rise as firms continue to expand or update their information technology networks.
In addition to an overall increase in job openings, the future employment chances for women working in information technology are also expected to rise. According to PayScale, males currently make up 95% of Computer Network Architects, down from 97% a few years ago, a pattern highlighting the expanding prospects for women to work in this field and for businesses and organisations to hire them.
Potential Pros & Cons of Freelancing vs Full-Time Employment
Freelancing Computer Network Architects have more flexible work schedules and locations. They fully own the business and can select their projects and clients. However, they experience inconsistent work and cash flow, which means more responsibility, effort and risk.
On the other hand, a full-time Computer Network Architect has company-sponsored health benefits, insurance, and retirement plans. They have job security with a fixed, reliable source of income and guidance from their bosses. Yet, they may experience boredom due to a lack of flexibility, ownership, and variety.
When deciding between freelancing or being a full-time employee, consider the pros and cons to see what works best for you.