Essential Networking Protocols and Concepts Explained
Chapter 3: Networking Essentials
Home Network Properties
A small home network interconnects three computers for gaming and file sharing. Which two properties represent this type of network?
- It is difficult to implement security.
- A computer responds to a file-sharing application running as a server.
MTA Role in Email Handling
Which three statements are correct regarding the role of the MTA (Mail Transfer Agent) in handling email?
- Receives email from the client MUA (Mail User Agent).
- Transfers the email to the MDA (Mail Delivery Agent) for final delivery.
- Uses SMTP (Simple Mail Transfer Protocol) to route email between servers.
Purpose of DNS Resource Records
What is the purpose of resource records in DNS (Domain Name System)?
The server uses them to resolve names.
File Sharing Protocol in Microsoft Networks
Which application layer protocol describes the services used for file sharing in Microsoft networks?
SMB (Server Message Block)
OSI Model Layer for User Interaction
Which layer of the OSI model supplies services that allow users to interact with the network?
Application
Application Server Handling Multiple Clients
How do you usually process the application layer of an application server servicing multiple clients?
Use the support of the lower layer functions to distinguish between service connections.
Characteristics of Clients in Data Networks
What are two characteristics of clients in data networks?
- Initiate data exchanges.
- Can upload data to servers.
Advantages of Client-Server Model
A network administrator is designing a network for a new branch of twenty users. What are two advantages of using a client-server model?
- Centralized management.
- It is easier to implement security.
Protocol for File Transfer
Which application layer protocol is commonly used to support the transfer of files between a client and a server?
FTP (File Transfer Protocol)
Drawback of Telnet Compared to SSH
Compared to SSH (Secure Shell), what is the main drawback of Telnet?
Does not support encryption.
Email Components for Forwarding Mail
Which two email components are used to forward mail between servers?
- MTA (Mail Transfer Agent)
- SMTP (Simple Mail Transfer Protocol)
Role of the OSI Application Layer
What is the role of the OSI application layer?
Provides the interface between the applications at each end of the network.
Automated Service for Name-to-IP Address Matching
What is the automated service that manages the match between resource names and required IP addresses?
DNS (Domain Name System)
Possible Ways of Software Application Layer
What are two possible ways of software application layer?
- Applications
- Services
Destination Port for Communication
What is the destination port for communication that is represented on line 5?
80
Protocols at the OSI Application Layer
What are three protocols that operate at the application layer of the OSI model?
- DNS (Domain Name System)
- SMTP (Simple Mail Transfer Protocol)
- POP (Post Office Protocol)
Characteristics of Peer Networks
What are two characteristics of peer networks?
- Decentralized resources
- Resource sharing without a dedicated server
Properties of Peer Applications
What are three properties of peer applications?
- Act as a client and server within the same communication.
- Hybrid mode includes a centralized directory of files.
- Can be used in client-server networks.
Protocols for Web Resource Transfer
What are the two protocols used to control the transfer of Web resources from a Web server to a client browser?
- HTTP (Hypertext Transfer Protocol)
- HTTPS (Hypertext Transfer Protocol Secure)
Application Layer Protocols and Functions
Which two application layer protocols correctly coincide with a corresponding function?
- HTTP transfers data from a Web server to a client.
- Telnet provides a virtual connection for remote access.