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Application-Layer Protocols: Fundamentals and Web Protocols, Exams of Communication

Nevada State CollegeCommunication

An overview of the fundamental concepts and principles of application-layer protocols, with a focus on web protocols. It covers the two broad types of application-layer protocols (private communication and standardized service), the aspects of api interaction (data representation and data transfer), and the key web protocols such as html, url, and http. The document also discusses the characteristics of http, including its request types (get, head, post, put), caching, and file transfer protocols like ftp. Additionally, it covers email protocols, including the transfer, representation, and access protocols, as well as the domain name system (dns) and name resolution. This comprehensive coverage of application-layer protocols and their various aspects can be valuable for students studying computer networking, web development, and related fields.

Typology: Exams

2024/2025

Available from 10/19/2024

Chloelunar
Chloelunar 🇺🇸

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CIS 430 Chapter 4 Exam Questions And
Answers
two broad types of application-layer protocols - - - correct answer
✅- Private communication
- Standardized service
Private communication - - - correct answer ✅- A programmer
creates a pair of applications that communicate with a proprietary
protocol
- code can be written without writing a formal protocol
specification
Standardized service - - - correct answer ✅- Expectation is that
many programmers will create software
- May offer server or client software implementation
- Protocol must be documented independent of implementation
- The specification must be precise and unambiguous
Two aspects of interaction of API - - - correct answer ✅-Data
Representation
-Data Transfer
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Answers

two broad types of application-layer protocols - - - correct answer ✅- Private communication

  • Standardized service Private communication - - - correct answer ✅- A programmer creates a pair of applications that communicate with a proprietary protocol
  • code can be written without writing a formal protocol specification Standardized service - - - correct answer ✅- Expectation is that many programmers will create software
  • May offer server or client software implementation
  • Protocol must be documented independent of implementation
  • The specification must be precise and unambiguous Two aspects of interaction of API - - - correct answer ✅-Data Representation -Data Transfer

Answers

Data Representation - - - correct answer ✅Syntax of data items that are exchanged, specific form used during transfer, translation of integers, characters, and files between computers Data Transfer - - - correct answer ✅Interaction between client and server, message syntax and semantics, valid and invalid exhange error handling, termination of interaction. Web Protocols - - - correct answer ✅• The World Wide Web (WWW) is the most widely used service in the Internet

  • WWW is complex - many protocol standards have been devised to specify various aspects and details HTML - - - correct answer ✅A Representation standard used to specify the contents and layout of a web page URL - - - correct answer ✅A representation standard that specifies the format and meaning of web page identifiers HTTP - - - correct answer ✅A transfer protocol that specifies how a browser interacts with a web server to transfer data.

Answers

  • Can download or upload data
  • Incorporates caching GET - - - correct answer ✅Requests a document; server responds by sending status information followed by a copy of the document HEAD - - - correct answer ✅Requests Status Information; server responds by sending status information, but does not send a copy of the document. POST - - - correct answer ✅Send data to a server; the server appends the data to a specified item(e.g., a message is appended to a list) PUT - - - correct answer ✅Sends data to a server the server uses the date to completely replace the specified item( i.e., overwrites the previous data) four HTTP request types - - - correct answer ✅GET, HEAD, POST, PUT Caching - - - correct answer ✅provides an important optimization for web access

Answers

File Transfer Protocol (FTP) - - - correct answer ✅• A file is the fundamental storage abstraction

  • A file can hold an arbitrary object
  • FTP can copy of a file from one computer to another
  • File transfer across the Internet is complicated because computers are heterogeneous. email interface application - - - correct answer ✅• A mechanism for a user to compose and edit outgoing messages as well as read and process incoming email
  • Email software is divided into two conceptually pieces: - - - correct answer ✅- A mail transfer program
  • An email interface application mail transfer program - - - correct answer ✅• acts as a client to send a message to the mail server on the destination computer; the mail server accepts incoming messages and deposits each in the appropriate user's mailbox

Answers

  • Sends one copy of a given message Mail Access Protocols (POP, IMAP) - - - correct answer ✅• email access is provided by protocols
  • Distinct from a transfer protocol Access protocols have the following characteristics - - - correct answer ✅- Provide access to a user's mailbox
  • Permit a user to view headers, download, delete, or send messages
  • Client runs on user's personal computer
  • Server runs on a computer that stores user's mailbox Domain Name System (DNS) - - - correct answer ✅• Whenever an application needs to translate a name
  • DNS provides a service that maps human-readable symbolic names to computer addresses
  • Syntactically, each name consists of a sequence of alpha-numeric segments separated by periods top-level domain (TLD) - - - correct answer ✅DNS specify values for the most significant segment,

Answers

name resolution - - - correct answer ✅• The translation of a domain name into an address is called name resolution