Difference between packet sniffing and packet spoofing?
Passive wiretapping, usually on a local area network, to gain knowledge of passwords.
Attempt by an unauthorized entity to gain access to a system by posing as an authorized user is spoofing
In a twisted-pair wire how does the twist ratio affect trasnmission?
The "twist" in a twisted pair helps to prevent induced voltage. if the wires are straight and parallel the wires will get charged with voltage much like a transformer gets charged by the forces running parallel to it on the other side of the core. As far as its affect on radio transmissions. Radio frecuencies are resonant at different lengths. For example 144Mhz is resonant at 2meters or at fractions of the same. 28mhz is resonant at 11meters A quarter wave at 2meters is 19.1 inches. a quarter wave at 11meters is 8.5 feet. By having a twist in the wire you would be nullifying the possibility of induction because the plus and minus poles would be crossing each other at a rate much closer than the resonant lenght of the nearby transmitter. Interference used to be much greater in the old days when the telephone company used two pair straight wiring( red,green,yellow, black) to wire houses. I hope this helped to answer your question. Ex. Telephone Company Installer Current Amatuer Radio Operator
Wireless router that works with Verizon wireless card?
There is not a wireless router that works with a Verizon Wireless air card. For this purpose you need to try to exchange your equipment for a MiFi which has the same plans but is a WiFi hotspot that up 5 five devices can connect to wirelessly.
If you just bought your service and are out of 30 day worry free guarantee, it will cost you full retail which can be around $300 or more. However if you have had plan over 1 year, you will be able to do an annual upgrade as long as you are on 5 GB data plan. Then you should be able to snag one for $130 with a $50 mail in rebate.
How is it possible for two network cards to work on the same computer?
That's an easy one!
Each Network Interface Card (NIC) has its own machine level address, called a MAC address which is assigned and programmed into it during manufacture. This is different from the IP address, which can be changed.
A NIC is a special hardware card that handles the sending and receiving data computer network.
The address that identifies a NIC is called the Media Access Control (MAC) address. A MAC address identifies a specific physical device and never changes for the life of the NIC. Two NICs never have the same MAC address (unless some manufacturer screws up royally [which has happened]). Because your NIC's MAC address is permanent, it's often referred to as the "real," or physical, address of a computer.
Two get two cards working just install them and their drivers. If they are both identical, they can use the same driver set.
to answer this I need to know what your service provider is??? I got cox and sometimes they do like a diagnostic check every once in a while I can always tell because my router lights gets all screwy and I am not able to use the internet for a little bit.
What cabling element does not commonly occur in coaxial cable?
A cabling element that does not commonly occur in coaxial cables is cladding.
Open System Interconnection (OSI) reference model,
Consists of seven layers
Does fiber optic cables rely on total internal reflection?
Total internal reflection allows information to be transmitted as light inside the cables. Light transmitted into one end at an angle larger than the critical angle with respect to the inner surface of the wire is trapped, bouncing between the inner walls of the fiber until it reaches its destination or leaks out. All the while the light maintains a velocity of about 671,000,000 mph (1,079,000,000 km/h) in the direction of its motion, a significant fraction of which is in the direction of the axis of the cable as calculable through vector addition. That fraction is the speed of information today.
Weather
What is ATM in networking field?
Asynchronous Transfer Mode is a dedicated connection switching technology that organizes digital data into 53-bytes cells or packets and transmits them over a medium using digital signal technology.
the ATM is rather implemented as a hardware rather than a software, due to this infrastructure it is made as a switch which provide a unique network segment therefore separating network/networking conflicts over the via network.
information passed from one segment to the other from one network group NIC to the other, the process from which information is passed is a simple one?
we have two types of LAN's namely the token ring and the Ethernet what happen is that each NIC wait for a network remains silent before an information is passed from one workgroup computer to the other. but in case there is a collusion (a process where two information from different meets on the same cable line) in the network information is sent back to their respective place and wait for a silence in network before an information could be linked out again, but when there is still a collusion again the process is repeated again until there is silence and information is passed to the other side of the network.
any information please feel to contact me on my email address
-spaldinggbortor@yahoo.com
What is meant by software copyright responsibility?
An IT professional is often responsible for ensuring all computers he or she is working with have legal software; this frequently appears on resumes and job announcements as software copyright responsibilities.
Just an observation should this information be made public?
What is the transmission signal coding method for a T1 carrier called?
There are a number of different encoding methods used on T1 lines. Alternate Mark Inversion (AMI), Bipolar With 8-Bit Substitution (B8ZS), and High Density Bipolar Three Code (HDB3).
veins have many thin layers with circular elastic and muscle fibres and a wide lumen
A-CRC requirements
1-the sender and receiver agree upon a generator polynomial in advance, before transmission starts.
2-both the high and low bits of the generator must be 1
3-to compute checksum for a frame, the frame must be longer than the generator polynomial
B-CRC Steps
assume message=M(x)
generator polynomial=G(x)
degree of G(x)=R
1-Multiply M(x) by xR giving R zeros in the low order end of the frame
2-Divide the result of the 1st step by G(X), using modulo-2 division
3-Add the remainder of the 2nd step to M(x), thus placing up to R terms in the
R low-order positions
C-CRC Error Detecting capability
assume a generator polynomial of H Bits
1-all single bit errors
2-all double bit errors
3-all odd number of bit errors
4-all burst errors < H
5-most burst errors >=R
How catalyst switch different from the simple switch?
Catalyst switches have support for several technologies that may be used in larger networks, and that are not available on home switches - for example, VLANs, and STP (Spanning-Tree Protocol), as well as options for port security.
Catalyst switches have support for several technologies that may be used in larger networks, and that are not available on home switches - for example, VLANs, and STP (Spanning-Tree Protocol), as well as options for port security.
Catalyst switches have support for several technologies that may be used in larger networks, and that are not available on home switches - for example, VLANs, and STP (Spanning-Tree Protocol), as well as options for port security.
Catalyst switches have support for several technologies that may be used in larger networks, and that are not available on home switches - for example, VLANs, and STP (Spanning-Tree Protocol), as well as options for port security.
What is straight through connection?
UDP is a new technology that is still in development but still available in many computers that achieves a "straight through" connection. It may loose many packets before received YET provides a more stable connection from the host to your computer.
Functions of the server in networking?
Many networking services use a client-server model, where information is centralized at a server. The server will wait for requests from a "client", and once it receives one, it will reply. The functions vary widely, depending on what server you use; you have centralized storage of files, databases (as in "an oracle server"), dynamic assignment of IP addresses (DHCP server), centralized printing (print server), sharing an Internet connection (Proxy server), and many others.
"Server" may refer to any of these services, but also to the computer that hosts these services.
Can Ethernet switch be used in lieu of router?
An Ethernet switch can not fulfill the role of a router, unless it be a "layer 3 switch" also known as "multilayer switch", which has capabilities of both a switch and a router - and is more expensive than either (mainly because it is optimized for handling lots of traffic, quickly).
For a small network, you don't really need a router. Routers are used to divide larger networks into smaller subnets, for efficiency, security, and administration. Routers are also used to connect different branches of a company to headquarters, or to each other, via WAN technologies - the router's role, in this case, is to connect the Ethernet network of a company's branch, to a WAN technology.
Every computer above Windows 95 made by Microsoft, every Mac, every Linux mainstream distribution can have alternate or secondary ip addresses and gateway entries staticly installed per pc. Thus combining both networks on a single Lan with a single router or without a router without conflict.
RJ-11 modem port connects a laptop to a cable lan?
no the rj-11 connection on the back of your laptop is part of the internal dial-up modem and therefore is a phone and is for connecting to a telephone line. it has six-wire conducters in it and is smaller than the lan wire which is called r45 which is an 8 conducter wire. they are not compatible they do not speak the same language. did you check and see if you have a port on the laptop that says t-10/100 ethernet? if you have an ethernet port that is how you would connect this computer to your home network.
What is the use of adding header and trailer to the frames?
Trailer is added at only data link layer because data link layer provides error and flow control.Header Contains address of device where frames will be send