Web Design & Development, Assignments of Network Technologies and TCP/IP

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Unit 16 : Web Design & Development

Higher National Diploma in Digital Technologies

Lecturer name

Unit Introduction

• (^) Unit title :- Web Design & Development
• (^) Unit code :- R/615/
• (^) Unit level :- 4
• (^) Credit value :- 15 Credits

Learning Outcomes and Assessment Criteria

LO1 – Explain server technologies and management services associated with hosting and managing

websites

PASS MERIT DISTINCTION

P1 Identify the purpose and types of DNS, including explanations on how domain names are organised and managed. M1 Evaluate the impact of common web development technologies and frameworks with regards to website design, functionality and management. D1 Justify the technologies, management services, tools and software chosen to realise a custom built website. P2 Explain the purpose and relationships between communication protocols, server hardware, operating systems and web server software with regards to designing, publishing and accessing a website. M2 Review the influence of search engines on website performance and provide evidence-based support for improving a site’s index value and rank through search engine optimisation.

Learning Outcomes and Assessment Criteria

LO2 – Categorise website technologies, tools and software used to develop websites

PASS MERIT DISTINCTION

P3 Discuss the capabilities and relationships between front-end and back-end website technologies and explain how these relate to presentation and application layers. M3 Evaluate a range of tools and techniques available to design and develop a custom built website. D1 Justify the technologies, management services, tools and software chosen to realise a custom built website. P4 Discuss the differences between online website creation tools and custom built sites with regards to design flexibility, performance, functionality, User Experience (UX) and User Interface (UI).

Learning Outcomes and Assessment Criteria

LO4 – Create and use a Test Plan to review the performance and design of a multipage website

PASS MERIT DISTINCTION

P7 Create a suitable Test Plan identifying key performance areas and use it to review the functionality and performance of your website. M5 Evaluate the Quality Assurance (QA) process and review how it was implemented during your design and development stages D3 Critically evaluate the results of your Test Plan and include a review of the overall success of your multipage website; use this evaluation to explain any areas of success and provide justified recommendations for areas that require improvement.

TCP/IP Protocol

TCP/IP is an industry-standard suite of protocols designed for large internet works spanning wide area network (WAN) links. The purpose of TCP/IP was to provide high-speed communication network links. Since 1969, ARPANET has grown into a worldwide community of networks known as the Internet.

TCP/ IP Protocol Suite

TCP/IP protocols map to a four-layer conceptual model known as the DARPA model. The four layers of the DARPA model are: Application, Transport, Internet, and Network Interface. Each layer in the DARPA model corresponds to one or more layers of the seven- layer Open Systems Interconnection (OSI) model.

TCP/ IP Protocol Architecture

Network Interface Layer The Network Interface layer (also called the Network Access layer) is responsible for placing TCP/IP packets on the network medium and receiving TCP/IP packets off the network medium. TCP/IP was designed to be independent of the network access method, frame format, and medium. The Network Interface layer encompasses the Data Link and Physical layers of the OSI model. Note that the Internet layer does not take advantage of sequencing and acknowledgment services that might be present in the Data-Link layer.

Network Interface Layer

The Internet layer is responsible for addressing, packaging, and routing functions. The core protocols of the Internet layer are IP, ARP, ICMP, and IGMP. The Internet Protocol (IP) is a routable protocol responsible for IP addressing, routing, and the fragmentation and reassembly of packets. The Address Resolution Protocol (ARP) is responsible for the resolution of the Internet layer address to the Network Interface layer address such as a hardware address. The Internet Control Message Protocol (ICMP) is responsible for providing diagnostic functions and reporting errors due to the unsuccessful delivery of IP packets. The Internet Group Management Protocol (IGMP) is responsible for the management of IP multicast groups. The Internet layer is analogous to the Network layer of the OSI model.

Internet Layer

The Transport layer (also known as the Host-to-Host Transport layer) is responsible for providing the Application layer with session and datagram communication services. The core protocols of the Transport layer are; Transmission Control Protocol (TCP) User Datagram Protocol (UDP). The Transport layer encompasses the responsibilities of the OSI Transport layer and some of the responsibilities of the OSI Session layer.

Transport Layer

The Application layer provides applications the ability to access the services of the other layers and defines the protocols that applications use to exchange data. The most widely-known Application layer protocols are those used for the exchange of user information: The Hypertext Transfer Protocol (HTTP) is used to transfer files that make up the Web pages of the World Wide Web. The File Transfer Protocol (FTP) is used for interactive file transfer. The Simple Mail Transfer Protocol (SMTP) is used for the transfer of mail messages and attachments. Telnet, a terminal emulation protocol, is used for logging on remotely to network hosts.

Application Layer

The lower layers of TCP/IP protocol suit are primarily concerned with formatting, encapsulating and

transmitting data across the network.

These layers are closely associated with the underlying network hardware and network infrastructure

devices.

The topmost layer, Application Layer of TCP/IP protocol suit is concerned mainly with human interaction and

the implementation of software applications and related protocols.

TCP/IP protocol suit is included with a large number of applications and application protocols.

Using these applications and application protocols, data can be moved between hosts, and remote users can

communicate.

Summary

Frain, B. (2012) Responsive Web Design with HTML5 and CSS. UK: Packt Publishing.

Krug, S. (2013) Don’t Make Me Think: A Common-Sense Approach to Web Usability. USA: New Riders.

Lidwell, W., Holden, K. and Butler, J. (2010) Universal Principles of Design, Revised and Updated: 115

Ways to Enhance Usability, Influence Perception, Increase Appeal, Make Better Design Decisions and

Teach Through Design. USA: Rockport Publishers.

Links This unit links to the following related units: Unit 38: Planning Social Media Campaigns Unit 39: Digital Marketing

References