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Network Access Layer
Network Access Layer
Network Access Layer
Which of the following is not a Network Layer protocol in TCP/IP model? 
Which of the following is not a Network Layer protocol in TCP/IP model?. Which of the following is not a Network Layer protocol in TCP/IP model?
internet layer of the TCP/IP stack whereas, SNTP is an application layer protocol that helps in synchronizing clocks over the network.
Computer Networks Questions & Answers 
This set of Computer Networks Multiple Choice Questions & Answers (MCQs) focuses on “Network Layer”.. The network layer is concerned with __________ of data.
These segments are then transferred to the network layer and these are called packets. These packets are then sent to data link layer where they are encapsulated into frames
Which one of the following is not a function of network layer?. Explanation: In the OSI model, network layer is the third layer and it provides data routing paths for network communications
18 which of the following is not a function of the data link layer? Ultimate Guide. You are reading about which of the following is not a function of the data link layer?
Which one of the following task is not done by data link layer?a)framingb)error controlc)flow controld)channel codingCorrect answer is option ‘D’. What is the data link layer? Definition from SearchNetworking 
[Solved] Which one of the following functionality is not performed by . Which one of the following task is not done by data link layer?a)framingb)error controlc)flow controld)channel codingCorrect answer is option ‘D’
Cisco Internetworking Basics 
This document discusses the TCP/IP architecture and provides a basic reference model. It explains TCP/IP terminology and describes the fundamental concepts underlying the TCP/IP protocol suite
An architectural model provides a common frame of reference for discussing Internet communications. It is used not only to explain communication protocols but to develop them as well
Each layer in the stack performs a specific function in the process of communicating over a network.. Generally, TCP/IP is described using three to five functional layers
Computer Network MCQ (Multiple Choice Questions) 
1) Which of these is a standard interface for serial data transmission?. Explanation: The RS232C is a standard interface for serial data transmission that defines the protocol and physical interface for transmitting serial data fairly easily between associated appliances and computers.
Explanation: The star topology is the best network topology for large businesses because it is simple to control and coordinate from the central computer.. 3) Which of the following transmission directions listed is not a legitimate channel?
4) “Parity bits” are used for which of the following purposes?. Explanation: The parity bit is also known as the check bit, and has a value of 0 or 1
Which one of the following is NOT a function of transport layer? 
before i go in the next ones here is disabmiguity warning. if the application is using a custom transport protocol on top of UDP, i.e., RTP for transmitting multimedia, then, depending on the definition, it won’t be transport layer
ensures that the sender is not overloading the receiver with too much data to send. in TCP receiver sends the sender its window, i.e., the number of packets the receiver is ready to receive
in Internet, congestion control is responsibility of senders. Non-TCP applications are required to implement TCP-friendly congestion control (i.e., one that coexists with TCP)
7 Layers Explained 
The Open Systems Interconnection (OSI) model describes seven layers that computer systems use to communicate over a network. It was the first standard model for network communications, adopted by all major computer and telecommunication companies in the early 1980s
However, the OSI 7-layer model is still widely used, as it helps visualize and communicate how networks operate, and helps isolate and troubleshoot networking problems.. OSI was introduced in 1983 by representatives of the major computer and telecom companies, and was adopted by ISO as an international standard in 1984.
The application layer is used by end-user software such as web browsers and email clients. It provides protocols that allow software to send and receive information and present meaningful data to users
What is a Network Protocol? Definition and Types 
A network protocol is a set of established rules that specify how to format, send and receive data so that computer network endpoints, including computers, servers, routers and virtual machines, can communicate despite differences in their underlying infrastructures, designs or standards.. To successfully send and receive information, devices on both sides of a communication exchange must accept and follow protocol conventions
Without network protocols, computers and other devices would not know how to engage with each other. As a result, except for specialty networks built around a specific architecture, few networks would be able to function, and the internet as we know it wouldn’t exist
Network protocols break larger processes into discrete, narrowly defined functions and tasks across every level of the network. In the standard model, known as the Open Systems Interconnection (OSI) model, one or more network protocols govern activities at each layer in the telecommunication exchange
Application Layer in OSI Model 
The Application Layer is topmost layer in the Open System Interconnection (OSI) model. This layer provides several ways for manipulating the data (information) which actually enables any type of user to access network with ease
The Application Layer interface directly interacts with application and provides common web application services. This layer is basically highest level of open system, which provides services directly for application process.
Following are list of functions which are performed by Application Layer of OSI Model –. Data from User Application layer Data from Presentation Layer
OSI model 
The Open Systems Interconnection model (OSI model) is a conceptual model from the International Organization for Standardization (ISO) that “provides a common basis for the coordination of standards development for the purpose of systems interconnection.” In the OSI reference model, the communications between a computing system are split into seven different abstraction layers: Physical, Data Link, Network, Transport, Session, Presentation, and Application.. The model partitions the flow of data in a communication system into seven abstraction layers to describe networked communication from the physical implementation of transmitting bits across a communications medium to the highest-level representation of data of a distributed application
Classes of functionality are realized in all software development through all standardized communication protocols.. Each layer in the OSI model has well-defined functions, and the methods of each layer communicate and interact with those of the layers immediately above and below as appropriate.
It was the foundation for the development of the Internet. It assumed the presence of generic physical links and focused primarily on the software layers of communication, with a similar but much less rigorous structure than the OSI model.
[MCQ’s] Computer Network 
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Explanation: There are five layers in the Internet Protocol stack. The five layers in Internet Protocol stack is Application, Transport, Network, Data link and Physical layer
2.The number of layers in ISO OSI reference model is __________. Explanation: The seven layers in ISO OSI reference model is Application, Presentation, Session, Transport, Network, Data link and Physical layer
Network Access Control 
Customer Success with Forescout Network Access Control. “With Forescout, it was easy to see not only how many assets needed attention but exactly which ones and who they belonged to
“As soon as we saw and understood the power of the Forescout platform to bridge visibility and control security gaps – and of eyeSegment to noninvasively rectify segmentation shortfalls – we knew that it was what we were looking for.”— Jeff Haidet, Director of Application Development and Architecture, South Central Power Co.. “I could see clearly that every one of my direct reports would have an application for the Forescout platform
“The ability to remotely find the infected device and immediately neutralize or quarantine it to keep the network safe has been a game changer. Now we get an alert in our Splunk SIEM and, via Forescout integration, we know details such as whether or not the infected device is critical
Access Layer Functionality 
This section describes the access layer functions and the interaction of the access layer with the distribution layer and local or remote users.. The access layer is the concentration point at which clients access the network
The purpose of the access layer is to grant user access to network resources. ■ In the campus environment, the access layer typically incorporates switched LAN devices with ports that provide connectivity for workstations and servers.
■ So as not to compromise network integrity, access is granted only to authenticated users or devices (such as those with physical address or logical name authentication). For example, the devices at the access layer must detect whether a telecommuter who is dialing in is legitimate, yet they must require minimal authentication steps for the telecommuter.