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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
What is the Global Information Network That Kevin Trudeau Promotes?
(An Internet search will turn up two organizations that both refer to themselves as The Global Information Network. One is a news organization supporting reporters in Africa. The other organization is a private, exclusive society promoted by Kevin Trudeau. This answer explains the latter organization.)
The Global Information Network ("GIN," for short) is a private and exclusive organization that gives its members methods used by secret societies to create financial, physical and emotional prosperity. Global Information Network members believe in the Law of Attraction and the change that maintaining a consistently positive vibration can inspire in a life. GIN uses a system of audios, books and meetings to build personal networks that then create Napoleon-Hill-inspired mastermind groups. GIN is comprised of affiliates, members and a governing council.
Kevin Trudeau promotes The Global Information Network, but he is only one of several people who lead GIN. For more information on The Global Information Network, check out the related links.
Which gate is used as parity checker?
It can be calculated via an XOR sum of the bits, yielding 0 for even parity and 1 for odd parity
What happens with a lower ip address?
nothing, an ip address is simply a number used to identify you're computer over the web most commonly
How do you ping my server by IP address as well as by name?
The DNS server helps you to resolve the computer name to IP and vice versa
so just need to make sure the machine is up and connected in the network and on cmd
type ping 10.x.x.x(Ip address) enter
type ping abc.com(computername) enter
type ping -a 10.x.x.x(Ip address) enter
will give you name also
What are the three components of DNS named?
DNS COMPONENTS:
The DNS consists of three components. The first is a "Name Space" that establishes the syntactical rules for creating and structuring legal DNS names. The second is a "Globally Distributed Database" implemented on a network of "Name Servers". The third is "Resolver" software, which understands how to formulate a DNS query and is built into practically every Internet-capable application.
(A) Name Space:
The DNS "Name Space" is the familiar inverted tree hierarchy with a null node named "" at the top. The child nodes of the root node are the Top Level Domains (TLDs)-.com, .net, .org, .gov, .mil-and the country code TLDs, including .jp, .uk, .us, .ca, and so forth. Node names, known as labels, can be as many as 63 characters long, with upper- and lower-case alphabetical letters, numerals, and the hyphen symbol constituting the complete list of legal characters. Labels cannot begin with a hyphen. Upper- and lower-case letters are treated equivalently. A label can appear in multiple places within the name space, but no two nodes with the same label can have the same parent node: A node name must be unique among its siblings.
(B) Name Servers:
The second key component of the DNS is a globally connected network of "name servers". Each zone has a primary or master name server, which is the authoritative source for the zone's resource records. The primary name server is the only server that can be updated by means of local administrative activity. Secondary or slave name servers hold replicated copies of the primary server's data in order to provide redundancy and reduce the primary server's workload.
Furthermore, name servers generally cache data they have looked up, which can greatly speed up subsequent queries for the same data. Name servers also have a built-in agent mechanism that knows where to ask for data it lacks. If a name server can't find a domain within its zone, it sends the query a step closer to the root, which will resend it yet a step closer if it can't find the domain itself. The process repeats until it reaches a TLD, which ensures that the entire depth of the name space will be queried if necessary.
The combination of all the DNS name servers and the architecture of the system creates a remarkable database. There are more than 32 million domain names in the popular TLDs for which the whois utility works. Nominum, whose chief scientist, Paul Mockapetris, invented DNS, claims that there are more than 100 million domain names stored and that the system can easily handle 24,000 queries per second. The database is distributed-no single computer contains all the data. Nevertheless, data is maintained locally even though it's distributed globally, and any device connected to the IP network can perform lookups. The update serial number mechanism in each zone ensures a form of loose coherency on the network-if a record is out of date, the querier knows to check a more authoritative name server.
(C) Resolver:
The third component of the DNS is the "resolver". The resolver is a piece of software that's implemented in the IP stack of every destination point, or "host" in IETF-speak. When a host is configured, manually or through DHCP, it's assigned at least one default name server along with its IP address and subnet mask. This name server is the first place that the host looks in order to resolve a domain name into an IP address. If the domain name is in the local zone, the default name server can handle the request. Otherwise, the default name server queries one of the root servers. The root server responds with a list of name servers that contain data for the TLD of the query. This response is known as a referral. The name server now queries the TLD name server and receives a list of name servers for the second-level domain name. The process repeats until the local name server receives the address for the domain name. The local server then caches the record and returns the address or other DNS data to the original querier.newdiv
any type of connection
What is coaxial cable impedance?
Cable impedance is one of the characteristics that define how the cable will transmit signals. There are some simple and some far more complex descriptions of transmission lines on the Internet that describe the feature in more detail.
For the normal user, it is sufficient to know that video signals over co-ax cable will use 75 ohm cable. Most data signals that use co-ax cable will use 50 ohm cable. Generally, the source of the signal will have an impedance equivalent to the characteristic impedance of the cable. Similarly, at the end of the cable, the same value of impedance is needed.
When the cable is terminated properly, the signal will be transferred to the end of the cable without it reflecting back down the cable. It is the reflections that cause ghost images or smearing on a television image. As the length of cable increases, it becomes more important to make sure the correct impedance of cable is used with the correct termination.
ARP is not used for internetwork communications, it will send ARP to find gateway to be able to communicate with another network.
Category 6 Unshielded Twisted Pair, a specification for gigabit Ethernet wiring and connectors.
How long does it take to install fiber optic cable?
Well I know in New Zealand it takes like 3-4 hours and the government pays for everybodys installation
"Collectively, the methods used to improve performance and automatically recover from a failure are called RAID(redundant array of inexpensive disks or redundant array of independent disks).
(Pg. 480, A+ Guide to Managing and Maintaining Your PC)
The prefered DNS server for the site is the server which sends the dns zone updates to all the other servers in the site.
The primary DNS zone is created on the server and it has the authority to send changes in zone to other servers
What is difference between L3 switch and router?
A layer 3 switch has routing capability like a router. However, it also has layer 2 switching capabilities like a switch. To fulfill both functions, layer 3 switches will generally have a greater number of ports than most routers.
You need to use copper twisted-pairs called twinmax, it uses a special 9-pin connector known as HSSDC.
Can you use a Netgear wireless router as a wireless subnetwork without a cable connection?
Yes, you can. The only problem might be is that it can be tricky to set internet connection.
Explain the physical topology of Virtual Infrastructure 3 Data center?
Virtual Infrastructure Data centre consists of ESX Hosts, Virtual machines, Virtual centre Server, VI Client, web browser for web access to ESX hosts then Storage solutions like iSCSI, SAN ,NFS over a high speed Network or Fibre Channel
What is pinging an ip address?
Pinging is to determine and diagnose the quality of your internet connection. It's a tool to send out packets of data to a host (the IP OR web address) and wait for the traffic to return. The results of the ping will inform you how many packets were sent, were received, and if any, were lost, and the time it took for the round trip in milliseconds.
Anyone can conduct a ping and sometimes it's fun. Just click the start menu, type CMD, then type Ping www.Google.comthe results will appear in a second or so.
You can compare it to a submarine pinging for nearby ships - in fact that's where the term came from! :-)
When should a 802.11a network be installed instead of an 802.11g network?
When you need a higher level of security.
How can you protect a remote desktop connection from a brute force attack?
Use external software caled BFGuard so it will block IP address of atacker after few failed login atemps. for more visit wwwbfguard.com
