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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
Is there activity over a network if data is not being transferred?
Yes, there is activity; packets do not have to be generated for the sole purpose of carrying data. Some protocols, such as DHCP, or DNS, or ARP generate informational packets and are not carrying data. It is rare for a network to not transmit packets for long periods of time.
How can lost data be re-sent when the network layer uses unreliable and connectionless?
There is an optional checksum field that can be used by an UDP application, but in general a connectionless protocol does not use re-transmits of packets. It is assumed that this type of transport is sufficient even with lost packets. It is typically used where speed is more important than quality.
What are the two modes for wireless network connection?
For wireless networks you may connect either as an Ad-Hoc connection or an Infrastructure connection. Ad-Hoc connections are completely wireless, whereas infrastructure wireless connections are a combination of wired and wireless connections.
Name the five current IP address classes Which are used for unicast communication?
The five classes are A, B, C, D, E - but only A, B, and C are used for unicast communications. D is used for multicasts, and E is reserved for experiments.
The five classes are A, B, C, D, E - but only A, B, and C are used for unicast communications. D is used for multicasts, and E is reserved for experiments.
The five classes are A, B, C, D, E - but only A, B, and C are used for unicast communications. D is used for multicasts, and E is reserved for experiments.
The five classes are A, B, C, D, E - but only A, B, and C are used for unicast communications. D is used for multicasts, and E is reserved for experiments.
When must a router perform a recursive lookup on a route in the routing table?
show ip route
B 200.100.50.0 1.1.1.1
First look the 1.1.1.1 next hop which is directly connected
B 1.0.0.0 2.1.1.1 next hope is directly connected
So 2.1.1.1 is directly connected and router start the uni-cast routing.
this is a recursive lookup
How does the DHCP client respond to the DHCP server?
Below are the steps how DHCP Client/Server relationship works.
- IN the network the clicent device requests a packets to DHCP server to login to the network. This Packet known as DHCPDiscover.
- The DHCP Server receives that packet and in responce it sends a packet to the client, this is called as DHCPOffer. This DHCPOffer packet contains unleased or unused list of IP(Internet Protocol) addresses over the LAN.
- The DHCP Client receives the DHCPOffer from DHCP Server and responds. This is called DHCPRequest, and this request contains the accepted IP address in the DHCPOffer it received from DHCP Server.
- Now the DHCP Server receives the DHCPRequest and sends back the DHCPPackets and lets clients to access network.
What is wide area network used for in computers?
It allows for people in different buildings to connect on a network. It is also the network one would conenct to the internet The wide area network, often referred to as a WAN, is a communications network that makes use of existing technology to connect local computer networks into a larger working network that may cover both national and international locations. This is in contrast to both the local area network and the metropolitan area network, which provides communication within a restricted geographic area. Here is how the wide area network functions, and why it is so important to communications today.
In which layer of OSI model does GTP protocol stand?
There are actually two different GTP protocols.
GTP (Go Text Protocol) is basically an application layer protocol, although the definition is a bit fuzzy.
GTP (GPRS Tunneling Protocol) is a transport layer protocol that is used in conjunction with another transport layer protocol (TCP or UDP).
What are the characteristics of intranet?
The main elements of Intranet are as follows:
1. Communication
2. Analysis
3. Flexible access
4. Online workshop
5. Business Process
Your network id is 193.129.10.0 what are your possible subnet mask?
Since this is a class C address the subnet mask for the default would be 255.255.255.0. Other values could be:
255.255.255.128 - 255.255.255.252
What happend when a station is disconnected from a bus topology?
the rest of the network is unaffected but if a channel fails then the whole network fails.
Is DSL a WAN data link encapsulation?
Frame relay and PPP is used with WAN encapsulation.
Frame Relay most closely compares to the OSI data link layer (Layer 2). If you remember
that the word "frame" describes the data link layer protocol data unit (PDU), it will be
easy to remember that Frame Relay relates to OSI Layer 2. Like other data-link protocols,
Frame Relay can be used to deliver packets (Layer 3 PDUs) between routers.
UDP offers faster transfer of data important to VoIP and Games?
UDP= User Datagram Protocol is a protocol that is used in transferring data and exchange of message. Without it your computer cannot interacts with other computer in a network.
How do you splice two different size fiber optic?
With two multimode fibers in common usage today (50/125 and 62.5/125) and two others which have been used occasionally in the past (100/140 and 85/125) and several types of singlemode fiber in use, it is possible to sometimes have to connect dissimilar fibers or use systems designed for one fiber size on another. If you connect a smaller fiber to a larger one, the coupling losses will be minimal, often only the fresnel loss (about 0.3 dB). But connecting larger fibers to smaller ones results in substantial losses, not only due to the smaller cores size, but also the smaller NA of most small core fibers.
access control
How do you find IP address of a proxy?
1) Go to the Start Menu and select Run.
2) Type 'cmd' (no quotes) and press enter.
3) Type 'ping www.<proxyaddress>' (no quotes and replacing proxyaddress with the proxy you are using)
4) The IP address will be listed.
What is a proprietary certificate. what for it is used?
A proprietary certificate, also known as a proprietary key, is a certificate that contains information about another certificate. It allows the owner of this key to know the secret key to the other certificate. It's mostly used in service providers to discourage sharing of secret keys to those services by attaching them to sensitive information on the customer.
What is the Significance of ip address 255.255.255.255?
A special type of IP address is the limited broadcastaddress 255.255.255.255. A broadcast involves delivering a message from one sender to many recipients. Senders direct an IP broadcast to 255.255.255.255 to indicate all other nodes on the local network (LAN) should pick up that message. This broadcast is 'limited' in that it does not reach every node on the Internet, only nodes on the LAN.
How and why does sniffing improve your sense of smell?
brings more air into contact with the receptors..
If you have a wireless router it's very easy to do. But you will need one lan cable to connect the desktop to the router. Just connect the desktop to the router using the cable. Connect wirelessly both laptops to the router. Make sure that DHCP server is on. If it's not on you will have set up ip addresses manually.
If you have a switch you will need three lan cables (one per each computer). And you will have to set up all ip addresses wirelessly.
Without a switch or a router you can do it to but you still need a lan cable. You have to set up ip addresses manually and use the cable to connect one of laptops with the desktop.
PS: If you set up ip addresses manually all of them should be from the same subnet. For instance, first laptop has the ip address 192.168.1.1, second one 192.168.1.2, the desktop's ip address is 192.168.1.3
