Multicast routing is a targeted form of broadcasting that sends message to a selected group of user, instead of sending it to all users on a subnet.
What is the importance of Encryption on a network ?
Encryption is the process of translating information into a code that is unreadable by the user. It is then translated back or decrypted back to its normal readable format using a secret key or password. Encryption help ensure that information that is intercepted halfway would remain unreadable because the user has to have the correct password or key for it.
How are IP addresses arranged and displayed ?
IP addresses are displayed as a series of four decimal numbers that are separated by period or dots. Another term for this arrangement is the dotted decimal format. An example is 192.168.101.2
Explain the importance of authentication.
Authentication is the process of verifying a userís credentials before he can log into the network. It is normally performed using a username and password. This provides a secure means of limiting the access from unwanted intruders on the network.
What do mean by tunnel mode ?
This is a mode of data exchange wherein two communicating computers do not use IPSec themselves. Instead, the gateway that is connecting their LANs to the transit network creates a virtual tunnel that uses the IPSec protocol to secure all communication that passes through it.
What are the different technologies involved in establishing WAN links ?
Analog connections : using conventional telephone lines;
Digital connections : using digitalgrade telephone lines;
switched connections : using multiple sets of links between sender and receiver to move data.
What is one advantage of mesh topology ?
In the event that one link fails, there will always be another available. Mesh topology is actually one of the most fault-tolerant network topology.
When troubleshooting computer network problems, what common hardware-related problems can occur ?
A large percentage of a network is made up of hardware. Problems in these areas can range from malfunctioning hard drives, broken NICs and even hardware startups. Incorrectly hardware configuration is also one of those culprits to look into.
What can be done to fix signal attenuation problems ?
A common way of dealing with such a problem is to use repeaters and hub, because it will help regenerate the signal and therefore prevent signal loss. Checking if cables are properly terminated is also a must.
How does dynamic host configuration protocol aid in network administration ?
Instead of having to visit each client computer to configure a static IP address, the network administrator can apply dynamic host configuration protocol to create a pool of IP addresses known as scopes that can be dynamically assigned to clients.