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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
why is it important to match the latencies of the older modules to the newer modules
What do the first three bytes of MAC addresses normally signify?
version number of the network adapter
Answer: The Authenticated Header (AH)
In the IPSec protocol the only traffic that is unencrypted is the (AH). In other words, it only signs the traffic to retain its authentication & integrity, but no privacy.
L2tp
Why is using TELNET a security risk for an IP network infrastructure?
Because the telnet session is in clear text and programs can capture the passwords to log in to telnet sessions.
Is it only computer can be used in networking?
No, a no. of networking elements are used in networking. some of the networking elements are : routers, switches, cables, servers etc
A web hosting or email provider company that uses / assigns IP addresses and the company is based in the US.
The network command 'ping' issues a series of standard, small messages to the destination network address specified by the user. For example:
ping 192.168.0.1
This command will send a number of 'ping' messages to the computer on the network with IP address 192.168.0.1
Upon receiving these messages, the destination machine will echo the same message back to the sender. This is used as a simple check of the network connectivity between the two computers on the network. Since an unreachable address will result in no message being returned, the sending machine must know how long to wait before considering the message lost. This time is known as the 'timeout'.
By default, it is 1000 millisecond (1 second) but it can be set to any time by the user with the '-w' option. For example:
ping -w 2000 192.168.0.1
This will cause the ping program to wait for two seconds before considering a ping packet lost.
Are both UDP and IP unreliable to the same degree?
When IP sends a packet, it receives a confirmation for each packet and, if needed, rebroadcast the packet. This makes it reliable. UDP does not get confirmation. It broadcast each packet only once and assumes that it get to you. This makes it less reliable then IP because it does not check for problems or rebroadcast.
What are the advantages and disadvantage of unguided media in transmission media?
easy for transmission of data
data can be cracking can be dertermine
you have to go into applications then java network and check your on the right option if not change it if you do go back and click java then click opera mini it takes a while to install and about a 1/3 way through it ask for Internet connectivity click the tick and wait for it to install takes from 2-10 mins to install.
What does Network Manager do when you install a Network Interface Card?
Power off and unplug the computer. Then you would remove the side panel by removing the screws securing it in place. You are now looking at the motherboard. Identify the proper slot, in many cases a Conventional PCI Expansion Slot, and plug in the NIC, making sure of proper orientation with ports facing the gap on the case for external connections. Once a proper and secure connection is ensured, you may place the side cover back on, secure back in place with screws, and plug the computer back in. Power on the computer, and install relevant drivers and software. You will now have a functional NIC.
What three items are contained in a Ethernet header and trailer?
destination mac addresssource mac address
CRC - FCS
Why is it important to obtain approval or signoff on technical documentation?
When documentation is signed off it ensure that-
- The original specification and requirements criteria for documentation are being met,
- The formal acceptance, in writing, that the client, project manager or sponsor have accepted the documents are complete and accurate
- Work by outsourcing are formally accepted and ready for paid,
- Documents are authorized and ready for final production and distribution.
ABU (ATMC- Melbourne)
Which backup type will empty the application log on the server that is being backed up?
VSS Full backup
What layer of osi model does vlan operate?
VLAN's, or virutal local area networks, appear at the application level or Level 7 o the OSI model. VLAN's use tagging or pot+tagging to route traffic to and from a specific area (like a specific departement in a business). VLAN technology relies on ethernet connectivity throughout the network it functions on (a more ubiquitious medium than standard trunking and TCIP, etc).
VLAN's require an edge switch to tag the outgoing traffic and recieve the incomming traffic and allows you to prioritize traffic (tagged v/s untagged) so you can provide services like ip telephony, video sessions, SIP, etc.
