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Computer Networking
Computer networks are collections of computers which are connected together in order to communicate and transfer information. Questions about computer networks, networking protocols, and how to set them up belong here.
18,810 Questions
What is the difference between class a and class b address in network?
A class C network has a subnet mask of 255.255.255.0 and can have 254 IP addresses, for example from 192.168.0.1-192.168.0.255 A class B network has a subnet mask of 255.255.0.0 and can have 255 X 254 IP addresses, for example from 192.168.0.1 - 192.168.255.255
What does the term valve overlap mean?
Valve timing overlap is the time when both exhaust and intake valves are open most engines with catalytic converters require valve overlap in order to send a small amount of raw fuel/ air mix to the converter's. An "open cam" has valve overlap a "closed" cam does not
Can you connect two Ethernet switches to a third Ethernet switch?
Yes, more than one Ethernet switch be connected to a network. Typically care must be taken as not to create loops in one's network.
Difference between privacy and security?
Patients have a right to privacy, which means they can refuse to answer/share information with doctors or anyone else.
Confidentiality is a promise between two or more individuals (usually a doctor and patient) that information shall not be shared with others.
Why use a router instead of a switch?
A router can route data to the correct network in a way that is similar to a switch's method. However, a router can also forward a message to its correct destination over the most efficient available route, to destinations far removed from the LANs to which it is connected. Switches and bridges use MAC addresses to make decisions, but for TCP/IP, routers us IP addresses to determine the path by which tp send a packet.
What is the Difference between a single threaded file server and a multi-threaded file server?
Single thread means that the processor will wait until one 'process' is complete before it opens a new thread or 'process'. Multi-thread can handle multiple threads simultaneously making it faster and more responsive.
Do all home networks require each computer on the network to have its own network adapter?
No. Each computer's Operating System should have that built in.
All transport layer protocols are concerned with reliability?
I'm gonna say they most definitely are NOT all concerned with reliability. UDP is a transport layer protocol that provides connectionless, unreliable data delivery services.
Advantages and disadvantages of having international standards for network protocols?
Advantages:
- The adoption of international standards for network protocols results in the creation of equivalent, national standards that are substantially the same as international standards in technical content
- International standards is one way of overcoming technical barriers in international commerce caused by differences among technical regulations and standards developed independently and separately by each nation, national standards organization, or company. Technical barriers arise when different groups come together, each with a large user base, doing some well-established thing that between them is mutually incompatible.
International standards organizations remove any political advantage by publishing their network protocols publicly, and usually for free.
Disadvantage:
- International standards provide connections to different computers at different part of the world. So this may lead to differences such as appearance, o.s, and many other factors which results into conflicts in governmental regulations.
Frequency of mobile computing?
Each frequency will differ with each mobile device. Frequency is known as the number of times at which an electromagnetic wave oscillates per second.
What is the server in the data acquisition setup?
The job of the server in a data acquisition setup is to bridge the gap from the meter to dashboard. These servers help to make a complete end-to-end solution.
Identify two physical-layer network problems Choose two?
Two physical-layer network problems include cable breakages and missing NIC drivers. These problems prevent the first part of the network from working - the part where the data packet leaves the sender computer to travel towards the receiver.
How many bits comprise the network portion of a class c address?
Thirty bits make up the network portion of a class C address. Three bits are borrowed for the subnet mask. There is also a class A and a class B that are comprised of bits.
Why is checking the light of the networking device that connect to the ISP so important?
It can tell you if the ISP is the issue, as opposed to your computer or your own network at home.
What is the Types of network architectures?
- A design. The term architecture can refer to either hardware or software, or to a combination of hardware and software. The architecture of a system always defines its broad outlines, and may define precise mechanisms as well.
- An open architecture allows the system to be connected easily to devices and programs made by other manufacturers. Open architectures use off-the-shelf components and conform to approved standards. A system with a closed architecture, on the other hand, is one whose design is proprietary, making it difficult to connect the system to other systems.
An RCD stands - Resdual Current Device. It is nothing but RCCB (Residual Current Circuit Breaker) works by constantly monitoring the current flow between the live and neutral wire.
In normal operation with the two lines in balance the circuit works. If for any reason, even a small amount of imbalance in detected (as small as 30 milliamps) the breaker will trip in no more than 200 milliseconds. This is well within the limits of preventing both fire and bodily harm. Regards - Ramadass
Which information is found in both the TCP and UDP header imformation?
The host and destination ports.
What cable use to connect monitor to CPU?
There are a few cables used to connect a monitor to the rest of the system.
VGA-(Video Graphics Array) a 15 pin male connector and is the most common type of connector, it has been the standard since 1987. Although very common DVI is quickly taking its place.
DVI-(Digital Visual Interface) a video interface standard designed to provide very high visual quality on digital display devices such as flat panel LCD computer displays and digital projectors.
HDMI-a compact audio/video interface for transmitting uncompressed digital data. It represents a digital alternative to consumer analog standards. This is the newest and by far the best connection type for monitors as it transfers but video and audio. This cable type however has only recently become supported by mainstream video card creator.
