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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
Is there such thing as mono orange osis?
This is just a fake disease. It originated from Wizards of Waverly Place. Mono orange osis is when you can't see, taste, or hear the color orange.
This term described the way in which African Slaves maintained cultural traditions and family units.
Write a program to generate CRC?
/*
written by: Bibhakar Jha;
objective : to implement CRC in c programming language;
*/
//Program code to add CRC check bit
#include
#include
#define N strlen(g)
char t[28],cs[28],g[]="10001000000100001";
int a,e,c;
void xor()
{
for(c = 1;c < N; c++)
cs[c] = (( cs[c] == g[c])?'0':'1');
}
void crc()
{
for(e=0;e cs[e]=t[e]; do{ if(cs[0]=='1') xor(); for(c=0;c cs[c]=cs[c+1]; cs[c]=t[e++]; }while(e<=a+N-1); } int main() { clrscr(); printf("\nEnter data : "); scanf("%s",t); printf("\n----------------------------------------"); printf("\nGeneratng polynomial : %s",g); a=strlen(t); for(e=a;e t[e]='0'; printf("\n----------------------------------------"); printf("\nModified data is : %s",t); printf("\n----------------------------------------"); crc(); printf("\nChecksum is : %s",cs); for(e=a;e t[e]=cs[e-a]; printf("\n----------------------------------------"); printf("\nFinal codeword is : %s",t); printf("\n----------------------------------------"); printf("\nTest error detection 0(yes) 1(no)? : "); scanf("%d",&e); if(e==0) { do{ printf("\nEnter the position where error is to be inserted : "); scanf("%d",&e); }while(e==0 e>a+N-1); t[e-1]=(t[e-1]=='0')?'1':'0'; printf("\n----------------------------------------"); printf("\nErroneous data : %s\n",t); } crc(); for(e=0;(e if(e printf("\nError detected\n\n"); else printf("\nNo error detected\n\n"); printf("\n----------------------------------------\n"); getch(); return 0; }
What command can display tcpip configuration and refresh the ip address?
On Windows the command is IPCONFIG. That displays the configuration, though IPCONFIG /ALL displays everything. To do a DHCPREFRESH, type IPCONFIG /RENEW.
Some block cipher modes of operation only use encryption because the input is set to
some initialization vector and the leftmost bits of the output of the encryption function
are XORed with the first segment of plain text p1 to produce the first unit of cipher text
C1 and it is transmitted. While in decryption, the cipher text is XORed with the output of
the encryption function to produce the plain text.
The Windows command arp stands for address resolution protocol which simply transforms an IP address to its corresponding physical network address.
And 'arp -a' simply lists down the physical network addresses of the network devices connected to the current PC.
WHO stands for
World Health Organization.
Women Health Officer.
Web Hosting Optimization.
Advantage and disadvantage of OSI?
OSI Reference Model The OSI reference model is the primary model for network communications. The early development of LANs, MANs, and WANs was confused in many ways. The early 1980s saw great increases in the number and sizes of networks. As companies realized that they could save money and gain productivity by using networking technology, they added networks and expanded existing networks as rapidly as new network technologies and products were introduced. In 1984, the International Organization for Standardization (ISO) developed the OSI Reference Model to describe how information is transferred from one networking component to another, from the point when a user enters information using a keyboard and mouse to when that information is converted to electrical or light signals transferred along a piece of wire (or radio waves transferred through the air). ISO developed the seven-layer model to help vendors and network administrators gain a better understanding of how data is handled and transported between networking devices, as well as to provide a guideline for the implementation of new networking standards and technologies. To assist in this process, the OSI Reference Model separates the network communication process into seven simple layers. Dividing the network into these seven layers provides these advantages: Reduces complexity: It breaks network communication into smaller, simpler parts. It divides the network communication process into smaller and simpler components, thus aiding component development, design, and troubleshooting. Standardizes interfaces: It standardizes network components to allow multiple vendor development and support. Facilitates modular engineering: It allows different types of network hardware and software to communicate with each other. Interoperability between Vendors It allows multiple-vendor development through standardization of network components. Defines the process for connecting two layers together, promoting interoperability between vendors It Allows vendors to compartmentalize their design efforts to fit a modular design, which eases implementations and simplifies troubleshooting Ensures interoperable technology: It prevents changes in one layer from affecting the other layers, allowing for quicker development. Accelerates evolution: It provides for effective updates and improvements to individual components without affecting other components or having to rewrite the entire protocol. Simplifies teaching and learning: It breaks network communication into smaller components to make learning easier. Provides a teaching tool to help network administrators understand the communication process used between networking components The OSI Reference Model The OSI reference model consists of seven layers: physical, data-link, network, transport, session, presentation, and application. The OSI model layers usually do not correspond exactly to the protocol stack running on an actual system. The data-link layer protocols often include physical layer specifications. The network and transport layer protocols work together to provide a cumulative end-to-end communication service. The functions of the session, presentation, and application layers are often combined into a single application layer protocol.
Why connection oriented is more reliable than connection less protocol?
Connection oriented is more reliable because there is an acknowledgment received from data receiver (destination) that the data is receiving and transfer is successful which is not received from connection less protocol.
It appears as though you have the two concepts reversed; if you are using flow control than you are using a reliable delivery method - these are at layer 4 of the OSI model, which is TCP for reliable delivery. TCP provides flow control.
UDP would be used for speed, when you do not need reliable delivery. However, UDP does not use flow control, since there is no handshaking between transmission and reception, and it is a connectionless protocol.
What is the difference between bgp and ospf?
BGP is Border Gateway Protocol and OSPF is Open Shortest Path First.
Is the public key more secure than private key?
The questions is not really which key is more secure - rather it is a question of "can you determine the private key if you know the public key?"
Public and private keys are associated with asymmetric cryptography. They are generated as a pair. The security comes from the difficulty in determining the private key if you already know the public key and have some cyphertext that the private key has been applied to or encrypting text with the public key and determining what key would be required to decrypt it. Since each key can be used to decrypt cyphertext encrypted with the other key using the same algorithm, there is not inherent reason to think that one key is more secure than the other. In reality, one of the keys will be numerically a better starting point than the other when it comes to executing an attack on the encryption and deriving the other key. In practical terms, however, an attacker is always trying to start with the public key and discover the private key, without which messages encrypted with the public key cannot be decrypted (or without which the attacker cannot impersonate the holder of the private key).
Why are novatel mc 547 not connecting properly?
Most people may have various signal issues in your house.
The best solution would be to get the MOFI NETWORK MOFI3500-3GN Version 2 router and put your 4G or LTE stick in the back of the router. Make sure you put the router in a high spot near a window to get the best reception off your provider.
I have seen a lot of cause where people are trying to connect in the basement or other areas in their house and have this issue.
I would also recommend to get an external antenna to put on the stick.
With the router + external antenna, you will get the best solutions possible.
The MOFI router is the best for 3G\4G\LTE or for anyone looking to get the top of the line router.
It is not as cheap as some cheap ones but you get what you pay for.
switch
How can someone find their DNS server configuration?
Someone can find their Domain Name System, or DNS, server configuration just by using their computer. Just pull up your my computer file and search for DNS.
Yes, a TV can be considered a frame structure, as it typically consists of a rigid framework that supports various components, such as the screen, circuit boards, and casing. This framework helps maintain the integrity and shape of the television while allowing it to function effectively. The design ensures stability and durability, which are essential for the electronic components housed within.
What is maximum length of RG-59 coax?
RG59 is a video standard co-axial cable and is normally sold as an economy cable. Losses on this type of cable tend to be higher than more expensive cable.
A standard definition signal can be run in excess of 300 feet before losses are noticed but the signal quality relies not only on the cable but also the signal driver (the source) and the receiver (the display). If the source or receiver are not properly designed, there may be a tendency to show a ghost image appearing to the right of the original image.
For analog high definition signals (extremely rare today) the maximum distance will be much lower, perhaps in the region of 40 to 50 feet. If the application will be supporting HD signals, RG59 is probably not the best choice. Invest a little more and look for cables that have lower losses - PSF1/3, for example, is more expensive but also more effective.
