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3 years ago

Which first generation network topology used a single cable that connected all the computers in a line?

Computers and Technology

1 answer:

kap26 [50]3 years ago

8 0

Answer:

Bus topology

Explanation:

Network topology is a descriptive view or shape pattern of network devices arrangement on a network. It does not necessarily describe how packets are transmitted. They are different types of network topology, they are star, bus, token- ring, mesh.

In star topology, each computer on the network is connected to a central device, while all the computers in bus network is connected to a network line. In mesh topology, all computers are connected to each other, while computers are arranged in circles in a token-ring topology.

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Which control segment communicates with the satellites? OA master stations O B. monitoring stations O C. ground antennas D. cont

nignag [31]

Answer:

C. ground antennas

Explanation:

AKA Satellite Dishes That Communicate Just Like Direct Tv dish It is focused by a bowl-shaped parabolic dish onto a device in the center called a "feed horn", which channels the signal to a "low-noise block down converter" (LNB) which filters out unwanted interference, and sometimes converts it to yet another frequency before amplifying it and sending it to the satellite receiver

5 0

3 years ago

The OSI model is a useful tool in troubleshooting a network because it enables you to isolate a problem to a particular software

lutik1710 [3]

Answer:

1) Layer 4, transport

2) Layer 2, datalink

3) Layer 5, session

4) Layer 7, application

Description of Problems are as below:

1) One of your servers has been exhibiting sluggish network performance. you use a network-monitoring program to try to evaluate the problem. You find considerable TCP retries occurring because the server is being overwhelmed by data, and packets are being discarded.

2) You check some statistics generated by a network-monitoring program and discovers that an abnormally high number of CRC errors were detected. (Hint think of the cause of CRC errors).

3) A user is trying to connect to another computer, but the logon attempt is continually rejected.

4) You try to access a Linux server to share files by using NFS. You can communicate with the server, but the shared files don't appear to be available.

Explanation:

OSI Model is a reference model to determine how applications communicate over a network. OSI consists of seven layers, and each layer performs a particular network function. The seven layers are:

Layer 7 - Application.

Layer 6 - Presentation.

Layer 5 - Session.

Layer 4 - Transport.

Layer 3 - Network.

Layer 2 - Data Link.

Layer 1 - Physical.

Layer 4, transport

2) You check some statistics generated by a network-monitoring program and discovers that an abnormally high number of CRC errors were detected. (Hint think of the cause of CRC errors).

Layer 2, Data Link

3) A user is trying to connect to another computer, but the logon attempt is continually rejected.

Layer 5, session

4) You try to access a Linux server to share files by using NFS. You can communicate with the server, but the shared files don't appear to be available.

Layer 7, application

7 0

3 years ago

You need to fax a portion of a map from a large hard-cover atlas to a client from an internal fax-modem. To fax the map, the bes

Kay [80]

The fax modem is used to send and receive fax messages by only having phone line (fax machine is not required). The scanned documents should be saved as digital file (image or PDF format) in order to be sent. So, in order to send a portion of a map you should first convert the map into digital file and than simply send it through the fax modem. The best way to convert it to a digital file is to use an optical character recognition (OCR).

6 0

3 years ago

How does the use of cloud computing affect the scalability of a data warehouse? a. Cloud vendors are mostly based overseas where

zhenek [66]

Answer:

C. Hardware resources are dynamically allocated as use increases.

Explanation:

Cloud computing is a technique organisations to store and retrieve resources in a remote central database with secure access over the internet. It is able to access large data storage resources that would have cost more if they had implemented one for themselves.

A database or data centre is a online group of servers that is in a subscribed service to authorised users. Storage hardware allocation is dynamic to users, which means that another storage location in issued on every duration of subscription, making it easy to add more storage infrastructure. This defines the scalability of data centres.

4 0

3 years ago

One property of light that makes it possible to record the image of an object with the camera

KengaRu [80]

Answer:

Reflection

Explanation:

Reflection is the property of light in which when a ray of light hits a smooth surface, it bounces back in the direction in which it came from. If i is the angle between the normal to the surface and the incident ray, and r is the angle between the normal and reflected ray, the law of reflection states that the angle of incidence equals the angle of reflection. That is, i = r.

So, to record the image of an object with a camera, one property of light that makes that possible is reflection because, the incidence rays form an image of the object in the camera, while the reflected rays reflect the image so that it is visible to the eye.

7 0

3 years ago