CCNA 1 Exploration Cisco Quiz Test Correct Answers CHAPTER 3 Domande E Risposte Corrette Del Capito
CCNA 1 Exploration Cisco Quiz Test Correct Answers CHAPTER 3 Domande E Risposte Corrette Del Capito ::: https://blltly.com/2tuYfA
CCNA 1 Exploration: Chapter 3 Quiz Test with Correct Answers
This article provides a summary of the main topics and questions covered in Chapter 3 of the CCNA 1 Exploration course, which is part of the Cisco Networking Academy program. The chapter focuses on the application layer of the TCP/IP model and how it enables communication between network applications. The article also includes the correct answers to the quiz test at the end of the chapter, as well as some explanations for each answer.
Application Layer Overview
The application layer is the topmost layer of the TCP/IP model and it provides services and protocols that enable network applications to communicate with each other. Some examples of application layer protocols are HTTP, FTP, SMTP, DNS, DHCP, and Telnet. These protocols define how messages are exchanged between the source and the destination, as well as how data is formatted, encoded, compressed, encrypted, and authenticated.
The application layer also includes two forms of software: applications and services. Applications are programs that run on user devices and interact with the network through a user interface. For example, web browsers, email clients, and instant messaging programs are applications. Services are programs that run on network devices and provide support for network applications. For example, web servers, email servers, and DNS servers are services.
DNS stands for Domain Name System and it is a hierarchical distributed database that maps domain names to IP addresses. Domain names are human-readable names that identify network resources, such as www.cisco.com or www.google.com. IP addresses are numerical identifiers that are used by network devices to locate and communicate with each other.
DNS allows users to access network resources using domain names instead of IP addresses, which are easier to remember and more meaningful. DNS also allows network administrators to change the IP address of a resource without affecting its domain name, which provides flexibility and scalability.
DNS uses a client-server model to resolve domain names to IP addresses. A DNS client is a device that sends a query to a DNS server when it needs to resolve a domain name. A DNS server is a device that stores DNS records and responds to DNS queries from clients. A DNS record is a data structure that contains information about a domain name and its associated IP address.
Quiz Test Questions and Answers
What method can be used by two computers to ensure that packets are not dropped because too much data is being sent too quickly
B) flow control
C) access method
D) response timeout
Answer: B) flow control
Explanation: Flow control is a mechanism that allows two computers to synchronize the transmission and reception of data by regulating the speed and amount of data sent.
What type of communication will send a message to all devices on a local area network
Answer: A) broadcast
Explanation: Broadcast communication is a one-to-all communication where a message is sent from one device to all devices on the same network segment.
What process is used to place one message inside another message for transfer from the source to the destination
A) access control
D) flow control
Answer: C) encapsulation
Explanation: Encapsulation is the process of placing one message format into another message format. For example, an application layer message (such as HTTP) is encapsulated into a transport layer segment (such as TCP), which is then encapsulated into a network layer packet (such as IP), which is then encapsulated into a data link layer frame (such as Ethernet).
A web client is sending a request for a webpage to a web server. From the perspective of the client, what is the correct order of the protocol stack that is used to prepare the request for transmission
A) HTTP, IP, TCP, Ethernet
B) HTTP, TCP, IP, Ethernet
C) Ethernet, TCP, IP, HTTP
D) Ethernet, ec8f644aee