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Local Area Network
Questions concerning the setting up, troubleshooting and operation of wired LANs used by businesses and other organizations
4,003 Questions
What is a public ip different then network id?
An "ip address" is a complete source or destination address that has a network id portion and a client or host portion.
The network id is just a piece of the IP address.
So, a public ip is an IP address that can be routed, whereas the network id is just a part of the public ip. They aren't different; the network id is part of the ip address.
that depends.
A router network interface is the same as a computer interface, so without a cross-over cable, your computer and router will both try to send data on the same pair of wires which doesn't work.
But, some routers are smart enough to sense that data is arriving on the wrong pair of wires and it will automatically swap its transmit and receive paths to make it work.
fm
Because of the overhead, TCP should not be used as a transport mechanism if the user or endpoints do not require reliable delivery, but are more interested in speed than quality.
90 Meters
Drag the networking terms on the left and drop them into their appropriate layer on the right?
This type of question is impossible to answer. We at WikiAnswers have no way to view the diagram, page, or picture that you are referring to.
What is the maximum speed at which data can be transmitted between two nodes?
The speed of light is the limit for the transmission of information. As for the bandwidth (the number of bits per second that are transmitted), fiber optics currently exist that allow 40 Gbps; experimentally, higher bandwidths have already achieved, but this is not standardized. It is also possible to connect several of those in parallel, to achieve even higher bandwidths.
Which topologies used in supercomputer?
Several different topologies are used in supercomputing. A mesh architecture is one of the more common topologies out there. Mesh architectures are particularly well suited to applied simulations. The canonical example is a simulation of ocean weather patterns where each node in the supercomputer will represent (and handle calculations for) a specific patch of ocean, such as a 10x10 square mile sector. In this example, each patch of ocean must communicate information, such as wind speed and temperature to other neighboring nodes and in turn, must update the sector parameters based on information received by its neighbors.
Other example topologies include the master/slave architecture where one node serves to aggregate and process results from all other nodes. There are also ring topologies, tree topologies, and hypercube topologies. By far the fastest communicating, and most expensive topology is the all-to-all topology where every node is connected to every other node. This works fine in superomputers with 20 nodes, but in the largest supercomputers, trying to connect thousands of nodes each to the other thousands of nodes becomes practically impossible. Hence why there are other topologies.
What information in a frame does a switch or bridge use to populate the MAC address table?
Source MAC address and source port
What network use star topology?
Star topology:- In this topology all PC are connected with the central device. Central may be HUB and SWITCH. Star widely use in all over word. Ring topology:- In this ring topology all PC are connected in the frame of ring are close Ring topology use MSAU each PC has a two never road one is called up Stream and called down stream. It used token passing Matterhorn which implement the token ring network. " Is the best of star topology".
Which device directs signals to all other nodes on a LAN?
A hub or repeater will repeat signals to all other devices on a LAN. In addition, any broadcast packet will be repeated to all other nodes of a LAN as well.
What is the difference between IGP and EGP?
IGP stands for Interior Gateway Protocol...and EGP- Exterior gateway protocol
As name suggests..that IGP works for Intra-Autonoumus system...and EGP works between two Autonoumous system
IGP examples: RIP,OSPF,EIGRP
EGP: IS-IS,BGP...
Explain the Distance Vector Routing Protocols and its features?
Distance Vector means that Routers are advertised as vector of distance and direction. 'Direction' is represented by next hop address and exit interface, whereas 'Distance' uses metrics such as hop count.
Routers using distance vector protocol do not have knowledge of the entire path to a destination. Instead DV uses two methods:
- Direction in which or interface to which a packet should be forwarded.
- Distance from its destination.
What are the routing metrics for OSPF?
OSPF uses cost as its routing metric .
cost is calculated for every outgoing interface of a router through which packets transfer.
it is calculated by the formula
cost = 100000000/(bandwidth of output interface)
most likely bandwidth of serial int is 1544kb= 1544000 bytes
PS: all cost calculation to be done in bytes for ease
Mesh
Assuming you are running in synchronous mode, a counter with a propagation time of 25 ns can run up to 40 MHz. Since there are other gates involved, I would consider a margin of safety to be 20 MHz.
the time between the arrival of material at a workstation and the start of work on it
Is peer to peer networking can be use by straight row?
Yes, peer to peer can be implemented in linear bus topology.
What are two reasons you would use DHCP on your network?
The Dynamic Host Configuration Protocol (DHCP) is a network management protocol commonly used for (among other things) assigning dynamic IP addresses to network clients. The primary benefit of using this technology is you can take a finite amount of IP address space and partition it out to transient users as it is needed, reclaiming addresses no longer in use. The use of DHCP also saves end users and desktop administrators from manually assigning IP addresses to systems. Let's look at how DHCP works.
When configuring DHCP, the network administrator sets a value known as the DHCP lease. This is the amount of time a system may retain an IP address without contacting the DHCP server. When the time expires, the system must reach out to the server and request a renewal of the DHCP lease. Generally speaking, DHCP leases are set to a long period of time (measured in days) on stable networks where the same systems are generally present from day-to-day. On the other hand, networks with many transient users (such as public hotspots) typically have short lease times to allow the efficient reuse of addresses.
DHCP churn is a term used to describe the fact that different systems may obtain the same IP address from a DHCP server when the first system's lease expires. This really isn't a problem, except in two special cases:
- You're trying to track systems for some purpose and don't have access to the DHCP logs. For example, if you're maintaining a spam blacklist and a spamming system shows up on your blacklist with a DHCP-provided address, you may inadvertently block future users of that address from sending mail.
- You're a researcher measuring the prevalence of some phenomenon across the Internet and use IP addresses to track systems. If a single system exhibits your target behavior, but has many different dynamically assigned addresses, it might skew your results.
The bottom line is, unless you're in one of those two very special cases, DHCP churn isn't a big deal. You should set your DHCP lease lifetime based upon your expected users needs and not worry about this issue.
*This answer was taken from the related link.
The question does not make sense; ICMP isn't broken - it is the protocol for informing other devices or users that there are problems on the network, or for control messages in general.
How many collision domains exist in a network with 15 hosts interconnected by means of a hub?
For any amount of clients connected to a hub you will get a total of 1 collision domain. A hub is a device that simply repeats all of the signals from the ports and does not separate clients into separate collision domains.
