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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 any special hardware required to use a LAN?
A NIC or Network Interface Card/Connection.
Your computer should have a LAN interface. You can identify it with RJ45 socket (has 8 pin connector slightly bigger than a telephone socket). If it is there already ensure than the LAN port is enabled in operating system. This port need to be connected to a working LAN network socket which comes through a switch/hub/router.
A conditional forwarder will forward DNS queries to different servers based on domain name.
What type of topology uses tokens?
Token ring uses star topology . The data token is being passed from one computer to other allowing all the computer to have network access and avoids data collision.
What is the Importance of the OSI seven layer model?
It was split in layers to separate different function in different blocks. In such way it's easier to maintain code and support as well as use it. And if it happens that one layer has problem you do not have to fix other layers. In programming it's called abstraction and encapsulation.
What are the three types of connection of a router?
- IP - internet protocol
- PPPoE - point-to-point protocol over ethernet
- VPN - virtual private network
For Send Mail Transfer protocol default port number as is 25.
SMTP actually stands for Simple Mail Transfer Protocol. I agree with the port number
Why would port security be enabled on a switch?
this allows you to give access to authorized personnel's only
Why layering is required in OSI model?
The simple answer is that a networking system is simpler, cheaper, and more reliable if it is implemented in terms of layers. Each layer accepts responsibility for a small part of the functionality. Having a clean separation of function between layers means that multiple layers do not need to duplicate functionality. It also means that layers are less likely to interfere with one another.
A simple example: in the TCP/IP protocol suite, the IP layer is very simple. All it does is (a) provide a uniform format for messages to be passed between computers that will work from anywhere on the Internet (regardless of what kind of link layer is being used), and (b) provide a uniform addressing model for computers on the Internet. IP does not ensure that messages are delivered correctly or reliably, it doesn't ensure that messages are not duplicated, and so forth. That's the job of higher layers. TCP, which is layered on top of IP, allows two computers to exchange messages of arbitrary length. Essentially, TCP takes care of fragmenting the messages into IP packets (which have a maximum size) and making sure that the entire contents of those messages arrive at their destination and are reassembled, in order, without duplicated or missing fragments. The TLS protocol (formerly known as SSL) is layered on top of TCP and provides encryption, digital signatures, and assures the integrity of the message against deliberate or accidental modification. Application protocols layered on top of TCP and/or SSL provide higher-level functions, such as delivery of email or a web page.
Similarly, protocol layers underneath IP are used to deliver messages on specific kinds of data links. Wireless LAN is somewhat different from a DSL circuit, cable TV Internet, point-to-point fiber optic link, or a wired Ethernet.
Does Mac OS support P2P networking?
Yes OS X supports P2P protocols and many other common protocols to windows, so there should not be a problem as long as you have compatible software.
The computers should still be able to communicate with each other, regardless of whether or not they are all using the same operating system, as long as all of the computers are on the same network.
Denial of service is preventing a system from providing resources or services to intended authorized clients.
Why is a modem necessary for connecting computers in networks?
Modems are a bit dated actually. Generally admins just use 'network cards' (NICs) nowadays. A network is a few computers all connected together...right. So if you want to plug your computer into that network.. where do you think the wire for the computer gets plugged into..??? The network card.
Advantage of TCP: reliable data transport. Lost packets are re-sent. For this reason, many protocols that transfer data rely on TCP; this includes FTP, HTTP, and several e-mail protocols.
Disadvantage of TCP: The extra overhead makes the transmission slower. When transmission speed is more important than reliability, UDP is used instead. This is the case with phone and video transmissions over the Internet.
Advantage of TCP: reliable data transport. Lost packets are re-sent. For this reason, many protocols that transfer data rely on TCP; this includes FTP, HTTP, and several e-mail protocols.
Disadvantage of TCP: The extra overhead makes the transmission slower. When transmission speed is more important than reliability, UDP is used instead. This is the case with phone and video transmissions over the Internet.
Advantage of TCP: reliable data transport. Lost packets are re-sent. For this reason, many protocols that transfer data rely on TCP; this includes FTP, HTTP, and several e-mail protocols.
Disadvantage of TCP: The extra overhead makes the transmission slower. When transmission speed is more important than reliability, UDP is used instead. This is the case with phone and video transmissions over the Internet.
Advantage of TCP: reliable data transport. Lost packets are re-sent. For this reason, many protocols that transfer data rely on TCP; this includes FTP, HTTP, and several e-mail protocols.
Disadvantage of TCP: The extra overhead makes the transmission slower. When transmission speed is more important than reliability, UDP is used instead. This is the case with phone and video transmissions over the Internet.
1. What dialog box do you use to configure TCPIPv4 settings for the network adapter?
To configure TCP/IPv4 settings for a network adapter, you use the "Properties" dialog box of the network connection. You can access this by right-clicking on the network adapter in the "Network Connections" window, selecting "Properties," and then clicking on "Internet Protocol Version 4 (TCP/IPv4)" in the list. From there, you can set the IP address, subnet mask, default gateway, and DNS server addresses.
What Types of network topology and give examples of each topology?
Network Topology refers to the way that cables and other pieces of hardware connect to one another. There are four common "base" types of topologies: bus, ring, star, and mesh. There are other types as well, but these are referred to as "hybrid topologies." The most commonly used network topology is a hybrid topology called the Star Bus Topology.
What is the difference between an Ethernet Address and an mac address?
Ip (Internet Protocol) addresses are assigned to networks (one per network) by an ISP (Internet Service Provider) such as Comcast. These are sent to everything you interact with online, so that your network, rather than your computer, is identified.
Now there are two kinds of Ip addresses: internal and external. Internal are used by your network to identify each device that connects to it. External Ip's are assigned by your ISP to identify you to the world. I explained the difference more in-depth in another answer, which is right here:
What_is_the_difference_between_an_Ip_address_and_a_http_address
Other than IP what is another example of a protocol that works at the Internet layer of TCP IP?
smtp, http, anything on that specific OSI layer.
Where can one purchase Bluetooth wireless products?
You can purchase a wireless home intercom system at your local retail store in the electronic section. You can also purchase them used online at websites such as eBay, Craigslist, and Amazon.
Why Can't the IP address 169.254.226.4 be routed on the internet?
Addresses that start with 169.254 are assigned when the computer doesn't find a DHCP server. Probably they are not routed because the network won't be unique - you might have different networks with the same address range. Different subnets have to have different address ranges.
Addresses that start with 169.254 are assigned when the computer doesn't find a DHCP server. Probably they are not routed because the network won't be unique - you might have different networks with the same address range. Different subnets have to have different address ranges.
Addresses that start with 169.254 are assigned when the computer doesn't find a DHCP server. Probably they are not routed because the network won't be unique - you might have different networks with the same address range. Different subnets have to have different address ranges.
Addresses that start with 169.254 are assigned when the computer doesn't find a DHCP server. Probably they are not routed because the network won't be unique - you might have different networks with the same address range. Different subnets have to have different address ranges.
When parity detects an error what happens?
A parity error always causes the system to hault. On the screen, you see the error message parity error 1 (parity error on the motherboard) or parity error 2 (parity error on an expansion card)
