(CCNA) Cisco Certified Network Associate Exam Latest Updated 2024 Questions With Verified Answers Download To Score

(CCNA) Cisco Certified Network Associate Exam Latest Updated 2024
Questions With Verified Answers Download To Score

Network Devices - Can be any devices that stand between computer host devices, including
switches, routers, hubs, repeaters, and firewalls. These devices control and optimize
communication between host devices.
Network Applications - World Wide Web - Technically, this is a network application that
allows the exchange of text pages coded in Hypertext Markup Language (HTML) using the
Hypertext Transfer Protocol (HTTP). Initially, these HTML pages only supported hyperlinks to
jump from one page to another. Now, HTTP and HTML have been augmented with dynamic
extensions to allow a much more advanced, rich, multimedia Web experience than just
jumping from one page to another.
Network Applications - Electronic Mail - This is a network application that allows the
exchange of messages between two hosts. In fact, studies show that this network application
is by far the most commonly used network application.
Network Applications - File Transfer and File Sharing - This network application allows the
transfer of files from one computer host device to another. Several variations of this
application exist, such as File Transfer Protocol (FTP), Secure FTP (SFTP), Network File
System (NFS), and Server Message Block (SMB), but all versions serve the same purpose: To
transfer files from one network host to another.
Network Applications - Remote Control - This network application allows you to control a
computer host remotely from another host in the network. As with file transfer, several
remote control applications exist, such as Windows Remote Desktop, Virtual Network
Computing (VNC), and remote shell (rsh).
Network Applications - Voice over IP (VoIP) and Video over IP - This network application
allows the transfer of voice and video signals over the Internet Protocol. Many Web sites
stream video over the Internet today. These sites use some VoIP network application to
wrap their video content in IP packets and send them over the network to the computer host
that requested the streamed video content. Another example of VoIP is Cisco IP phones,
which are being adopted today by many organizations to save costs by concentrating their
phone and data traffic over the same IP infrastructure.
Network Applications - Shared Network Storage - This network application connects
advanced specialized storage devices to a storage network, making them accessible to any
computer host connected to that storage network. Storage networks can be either
• Isolated, that is, connecting only to a few computer hosts locally
• Connected to other data networks
Network Applications - High Availability (HA) and Parallel Processing - This network
application enables computer hosts to act as a single logical host, sometimes also called a
"Computer Cluster". The hosts use clustering software that manages the logical
"supercomputer." The clustering software needs to have those physical computers
interconnected in a network.
Purpose of Computer Networks - Computer networks were developed to aggregate the
computing power of several individual computers into initially local networks, then campus
networks, then metropolitan networks, then countrywide networks, and finally, global
networks. A computer network is a group of computer host devices that communicate with
each other.
Computer Host Devices - - Can be any other devices used to access the network, including
servers, workstations, personal computers, smart phones, and laptops.
- A network host is a computer or other device connected to a computer network. A host
may work as a server offering information resources, services, and applications to users or
other hosts on the network. Hosts are assigned at least one network address.
Computer clusters are used for the following:
• High availability: Several levels of high availability exist, but generally speaking, HA implies
that whenever one of the physical computers in the cluster fails, the remaining computer(s)
takes over the load of the failed computer.
• Parallel Processing: In parallel processing, all physical computers in the cluster can
process data at the same time, thereby improving processing speed and reliability.
Both HA and parallel processing require a network connection between the physical
computer hosts involved.
Hub - - A simple network can be three hosts connected to a hub. A hub works very much like
a multiplexer, or a multiple socket power bar: Hosts connect to the hub, and they can
"speak" and "hear" each other.
- An Ethernet hub, active hub, network hub, repeater hub, multiport repeater, or simply hub
is a network hardware device for connecting multiple Ethernet devices together and making
them act as a single network segment. It has multiple input/output (I/O) ports, in which a
signal introduced at the input of any port appears at the output of every port except the
original incoming. A hub works at the physical layer (layer 1) of the OSI model. A repeater
hub also participates in collision detection, forwarding a jam signal to all ports if it detects a
collision.
- A hub is basically a multiplexed connection device: All devices connected to a hub can send
frames to all other devices connected to the hub. A hub sends frames it receives on all
ports, except on the port where the frame is received. Thus, even if a frame is only
addressed to one of the six hosts plugged in to the hub, in reality, all five hosts, other than
the
sending host, will receive the frame. Four hosts will have to discard the frame because it is
not addressed to them. Some hubs also amplify the electrical signal before sending it on all
ports other than the originating port. Those hubs are also repeaters