0
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 ip address of the first subnet of 172.16.0.0?
172.16.0.0. The first ip address within this subnet is 172.16.0.1
What are the requirements of wide area network?
• When a network spans a large geographical area, some form of standards must be applied to endure a uniform service throughout the WAN.
• The standard which are important:
1. X.25
2. Frame Relay
3. ATM
X.25
• The use of this protocol started in the 1970's.
• X.25 protocol started its way due to the need to provide users with wide area network (WAN) connectivity across public data networks (PDNs).
• X.25 protocol was the most popular one among others that were developed at that time.
• X.25 was developed by the common carriers, rather than any single commercial enterprise.
• Because of that, the specifications of the protocol are well suited to various system types.
• X.25 has been created in order to exchange data over WAN (Wide Area Network).
• The X.25 is a protocol for packet switching.
• The first version of the protocol was intended to work on a network with lower speed, end-to-end error detection and correction over noisy analog lines.
• The X.25 protocol has been developed due to the need to connect between lots of computer sites.
• The main role was to assure interoperability among various vendor products.
• Another goal was to maximize the sharing of network resources.
• X.25 protocol has methodologies for the three lowest layers:
• physical
• data-link and
• network
• It defines an "open" system connection by creating a standard interface for each layer.
• Therefore, it enables compatibility of multi-vendor hardware and software systems.
Frame Relay
• X.25 networks provides a consistent data rate for the user whether or not that bandwidth is used up.
• This is inefficient in terms of the bursty nature of data on a network.
• Frame Relay was created to cater to a higher data rate demand from users without incurring more costs.
• Frame relay consists of an efficient data transmission technique used to send digital information.
• It is a message forwarding "relay race" like system in which data packets, called frames, are passed from one or many start-points to one or many destinations via a series of intermediate node points.
ATM
• ATM Networks are connection-oriented.
• Communication first initializes by sending a first packet to setup the connection.
• The setup packet makes its way through the subnet, by making entries in the tables of intermediate routers.
• These connections takes the form of virtual circuits.
• The header part of the cell contains the connection identifier.
• The connection identifier tells all intermediate routers which cells belong to which connections.
• In ATM, cell routing is done in hardware, at high speed.
• Having fixed size cells is an advantage because its easy to build hardware routers to handle short, fized-size cells.
• Variable-length IP packets have to be routed by software, which is a slower process.
How many IP addresses in one ip octet?
A complete IP address has 4 octets.
MPGMichael
We are talking IPv4 because IPv6 uses quintets.
There are 4 octets in an IPv4 address. Each octet is separated by a dot (.)
Each place has a binary value assigned to it as follows.
128s, 64s, 32s, 16s, 8s, 4, 2s, and 1s place
The place values repeat in each octet
The place values are read from right to left in binary numbers
Within each octet there are 2^8 or 2 to the 8thpower possible addresses. So the math answer is 256.
However if you write it out you will see that 128+64+32+16+8+4+2+1 = 255 and 256 is actually carried to the next octet.
So there are 255 possible addresses in each octet
For example a class C address would look like this 192.168.1.2 or binary 11000000.10101000.00000001.00000010
What are the disadvantage of workgroup computer?
It is possible to network several computers using a wireless connection in a workgroup. However, a workgroup has disadvantages such as setting up accounts each with a password, takes time to setup, not easy to expand and file sharing has a maximum limit.
If a network is using a public IP address, anyone can use it to log on to the network. A private IP address requires a specific password. Only users who have the password can use that connection.
How do you find my laptop's Mac address?
You can find your laptop IP address for Windows XP by following the below steps:
1.Start->Run->cmd prompt
2.In that,just type ipconfig and then click enter
For example: It will show ip address like 74.110.208.65 .
If you want to check your network IP address that is provided by your ISP,
visit Ip-details.com .
How do you add contacts on yahoomailcom?
Click on contacts, then click add. Add a name, email, etc. You can also add people when they Instant Message you I believe.
What is the first valid host address of 193.168.22.1?
0001 0110 001 is the first valid host address of 193.168.22.1.
What is the host range for 192.168.1.0?
Assuming the subnet mask is 255.255.255.0 then...
You range of total addresses is from 192.168.1.0 - 192.168.1.255 However, the first and last IP addresses cannot be assigned to hosts since they are reserved for internal usage. The first address, 192.168.1.0, is the subnet address. The last address, 192.168.1.255, is the broadcast address.
Thus, the host range is from 192.168.1.1 - 192.168.1.254
What is the correct order for PDU encapsulation?
Frame Header - Network Header - Transport Header - Data - Frame Trailer
How many subnets and hosts per subnet can you get from the network 172.16.0.0?
There are 16 bits available; it is up to you how many of those bits you reserve for the subnet, and how many for the individual hosts within each subnet.
Advantages and disadvantages of computer technology?
Some advantages are that work is easier to complete and organization of data is easier. Disadvantages include hackers gaining access to information and the possibility of losing information when a computer crashes.
maximum number of different colours is 2 power 32
What is the name of a computer connected to a workstation?
A workstation is a computer connected to a server.
The IT GUY
If the network has WAP encryption, it takes about hour maybe two to hack the network and then if you are using your computer about couple hours you get your passwords. The only exception is bank websites which are using secured connections even in open (not secured) networks.
If the network is using WPA-PSK it takes much more time to get the keys. But it's still doable.
WPA-PSK2 with AES will give one of the best protections so far.
If you are using encrypted VPN connection you do not need to worry about such things.
What two statements describe packets that are sebt through a linksys integrated router using NAT?
Packets sent through Linksys integrated router using NAT can be described in two ways. First, packets have to be translated if they are sent to another LAN, and secondly, packets sent to hosts within the same LAN need no translation.
The domain admin account members are allowed administrative privileges for the entire domain. By default, the group has the local Administrator account on the Domain Controller as its member. A built-in group . After the first time installation of the OS, the only member of the group is the Administrator account. When a computer joins a domain, the Domain Admins group is added to the Administrators group. When a server becomes a domain controller, the Enterprise Admins group also is added to the Administrators group. The Administrators group has built-in capabilities that give its members full control over the system. The group is the default owner of any object that is created by a member of the group.
How many collision and broadcast domain are there if a router is directly connected to hub?
A hub contains a single collision domain and a single broadcast domain, regardless of the number of ports on the hub.
Do you need a modem or can you just use a router for the computer?
A router is used for connecting multiple computers to a single connection, but it doesn't provide the actual connection. You still need a cable modem or a DSL modem to connect to the router to provide the connection to the internet. Usually on the back of the router there is one port marked internet or uplink that you'll need to connect to the modem you get.
How many bits are used in the ipv4 addressing scheme?
The standard IPv4 (Internet Protocol version 4) address currently in use almost everywhere is a 32-bit number split into 4 8-bit values displayed as decimal numbers separated by periods. It is often referred to as a "dotted quad" (as in 192.168.3.24). None of the values should have a leading zero as it may be interpreted as a hexadecimal number (as in 192.168.3.024 and hex 024 will be used as decimal 36). An IPv4 address is split into a network number (your home or company) and a host (each individual machine on your network). The addresses are assigned to classes where class A, B, and C represent different network host capacities. Class D and E are reserved
There is a newer standard IPv6 (Internet Protocol version 6). An IPv6 address has 128 bits split into 8 groups of 16 bit values displayed as a hexadecimal numbers separated by colons (as in 3f45:1c65:05ab:babe:0000:0000:feed:0041). To simplify things, leading zeros can be removed (as in 3f45:1c65:5ab:babe:0:0:feed:41) and all zero entries can be removed altogether (as in 3f45:1c65:5ab:babe:::feed:41).
What is the primary function of the twists in the twisted pair cable?
The primary purpose of twisting wires/cables is retaining flexibility while increasing the ampacity (current capacity of wire/conductor). Twisted wire/cable is more flexible than a solid wire with same ampacity.
