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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
Information used are the source port number, the destination port number and ip addresses.
A mail server is an that recives incoming e-mail application from local users or domain users and forwareds outgoing e-mail. if you want to more information so you can visit website : http://www.iyogi.net
Which device must the computer connect to in order to use dial-up to access the internet?
The modem on your computer must connect to your Internet Service Provider's server over a land telephone line. You connect the computer's modem to a telephone jack as you would a telephone.
If a laptop is not used for awhile does the battery need to be replaced?
From what I know, you manage the laptop battery like a cell phone battery, which means you have to drain it every once in a while, and then fully charge it again. If you leave it off for a long time, it will probably lose some of its poiwer but it can still be used
If a firewall does nothing more than filter packets at what layer of the OSI model does it operate?
A firewall generally works at layer 3 and 4 of the OSI model. Layer 3 is the Network Layer where IP works and Layer 4 is the Transport Layer, where TCP and UDP function.
Many firewalls today have advanced up the OSI layers and can even understand Layer 7 - the Application Layer.
Which cable connector is used in a 1000BaseT network?
10base-T uses for twister pair cable which speed 10mbps.
Server
Approximately how many ip addresses are available for a single class b ip license?
License? Where do you get this?
In a Class B network there are 2 to the 16th power addresses.
Class B = 255.255.0.0
65536 addresses
In a Class A network there are 2 to the 24th power addresses
Class A = 255.0.0.0
16,777,216 addresses
In a class C network there are 2 to the 8th power addresses
Class C = 255.255.255.0
256 addresses
Class A around 16 million
Class B around 65,000
Class C is actually 254 NOT 256.
IP addresses are leased and therefore the lessee is given a license to use that particular IP address.
What are possible consequences of computer piracy?
Just as an example, Microsoft has lost millions of dollars by Chinese pirates copying windows and Microsoft office free and distributing it. This costs lost sales and it can lead to Microsoft raising prices to make up for it.
What is subnet mask and default gateway?
Subnet mask is a mask used to determine what subnet an IP address belongs to.
Default gateway is the gateway in a network that a computer will use to access another network if a gateway is not specified for use.
Lots of specialists claim that personal loans help people to live their own way, because they are able to feel free to buy needed goods. Furthermore, some banks give car loan for different classes of people.
Port addressing is giving different applications a unique port number so data can be forwarded to the correct application
What is usually a powerful personal computer that functions as the primary computer in a network?
network server
You can login to a server and send a file via that userid and server. It depends on your method, via Internet Explorer, you can UPLOAD the file. Via the command line, you can PUT the file to the destination.
It allows you to see whether a certain point in the network can be reached, or not.
It allows you to see whether a certain point in the network can be reached, or not.
It allows you to see whether a certain point in the network can be reached, or not.
It allows you to see whether a certain point in the network can be reached, or not.
The Presentation layer must make certain that the format of the data will be understandable by the Application layer. This includes the use of encryption, compression, different graphics formats, etc.
It uses a technique known as Portable Data Representation that allows data from different hardware to be able to communicate.
Is PC and laptop both are same?
Notebooks and Laptops are the same thing. Both words mean the same computer however a Netbook is where the difference is. A Netbook is usually a computer that has less hardware then the average laptop or notebook. Most Netbooks do not have a CDROM, they are smaller (7-12 inches) and they cost a lot cheaper then the average laptop.
What layer does ARP operate at?
ARP is protocol that doesn't fit nicely into the OSI model. It's not a layer two protocol because it utilizes Ethernet_II (Data Link) to get around with broadcast addresses (FF:FF:FF:FF:FF:FF). It's also not a layer three protocol because it doesn't provide routing capabilities. It maps layer 2 addresses to corresponding layer 3 addresses. So you could say it's 2.5. It is encapsulated within Ethernet_II frames.
What type of cable is used to connect a switch and router?
Current products will almost all connect with a standard Cat 5/5e/6 patch cable.
Older (but still recent) products will either connect to a specific port on the switch (usually identified as an UPLINK) port, or require the use of a crossover cable.
The issue is that ethernet sends and receives data on different pairs of wire. The newest generation of equipment is able to identify which wires to receive on, and which to transmit on, automatically.
Older equipment is not as intelligent and always transmits/receives on the same wires. This requires either a specially wired port on the switch (that changes the position of the transmit and receive in the jack) or a specially wired cable (that changes the t/r wires) in the plug.
