محتاج مساعده لحل

[maxtor]

هذه الاسئله ياجماعه ضرورى لو سمحتم وشكرا
What are the Advantages and Disadvantages of DHCP?
What is the difference between POP3 and IMAP Mail Server?
How can we create VPN to connect to branch office of the same office.what would be the priliminary requirment?
What is Bandwidth?
What is Mac Address?
What is frame relay, in which layer it comes?

[blossom]

انا نقلت لالجابه من مشاركه سابقه

What are the Advantages and Disadvantages of DHCP?

Advantages
All the IP configuration information gets automatically configured for your client machine by the DHCP server.
If you move your client machine to a different subnet, the client will send out its discover message at boot time and work as usual. However, when you first boot up there you will not be able to get back the IP address you had at your previous location regardless of how little time has passed.

[blossom]

Disadvantage

Your machine name does not change when you get a new IP address. The DNS (Domain Name System) name is associated with your IP address and therefore does change. This only presents a problem if other clients try to access your machine by its DNS name.


Your machine name does not change when you get a new IP address. The DNS (Domain Name System) name is associated with your IP address and therefore does change. This only presents a problem if other clients try to access your machine by its DNS name.

[blossom]

What is the difference between POP3 and IMAP Mail Server?


POP3 is Email clients download your emails onto your computer. Using a specialized email program such as Outlook Express or Apple Mail has the advantage of giving you complete control over your email; every email you receive is placed on your computer and you can keep as many large file attachments as you want.

IMAP is protocol that is being used in ***mail. Checking your email through our ***mail is similar to using Hotmail or YAHOO! Mail. You never actually copy your messages to your computer; in fact, you are looking at them through your *** browser on somebody else's computer. When you are not online, you are not able to see your email.

[blossom]

How can we create VPN to connect to branch office of the same office. what would be the preliminary requirement?


First of all what is VPN." VPN " stand for Virtual Private Network .Next how it works and where it is used . VPN works when the IP Conflicts and IP is conflict because we don’t use the PUBLIC IP means the IP we use is may be used by another Company or Branch then we use VPN it works in the MAC address principal means it doesn’t work on the IP it works Over the IP . And COMPUTER ,INTERNET or INTRANET, DHCP is required for the VPN .


We can connect to branch office of the same office thru a vpn by using backbone network provided by a service provider. ISP will provide till customer premises and customer at both sites shud use routers (CPE) to connect to the provider network. Packets are transferred over the provider network as if it is a private network i.e packets from a specific customer are never forwarded to an interface of a router on the backbone network which is not configured for that VPN. Although data of many customers are forwarded on the backbone, the end user feels as if it is a private network.
The preliminary requirement is that u must order for a leased / dedicated line from ISP.

[blossom]

What is Bandwidth?

Every line has an upper limit and a lower limit on the frequency of signals it can carry. This limited range is called the bandwidth

In computer networking and other digital fields, the term bandwidth often refers to a data rate measured in bits/s, for example network throughput.

[blossom]

What is Mac Address?

The address for a device as it is identified at the Media Access Control (MAC) layer in the network architecture. MAC address is usually stored in ROM on the network adapter card and is unique.

[blossom]

What is frame relay, in which layer it comes?

Frame relay is a packet switching technology. It will operate in the data link layer.