請大家幫忙!我姐姐的期中作業.對不起.佔版面...

原文由 大炸蝦 所發表
請大家幫幫忙..會幾題都沒關係..只要你們願意幫忙解題..因為我都不會..而我老姐他們班的也都沒有人會寫....請大家幫忙!謝謝
　 1.What are the five layer other than session layer and presentation layer ? What are the functions in each layer ?

2.Suppose the signal transition occurs 10六次方 timw per second and there are two signal levels,representing either 0 or 1.What are the baud rate and the bit rate?

3.Drawthe signak diagram of NRZ and Manchester encodings for the bit strings 101110.

4.Please compare the three terms :unicast, multicast and broadcast.

5.Please compare the three terms :simplex, half-duplex, and full duplex and give an example for each of them.

6.How does a PC know the MAC address of another PC on the same network? Please give the name of the required protocol and briefly explain how it works.

7.Consider the two IP address,140.113.88.150 and 140.113.84.23 with the netmask 255.255.192.0. Are the network parts of their IP address the same ? Why ?

8.We say IP networks are unreliable because packets can be lost duplicated or impaired. What protocol is needed to provide a reliable transport service? How does this protocol know a packet is lost comes with errors?

各位大大...這些就是題目..請你們幫幫我姐吧...其實還另外有一題是有圖的.真的想幫助我們的麻煩就去開我上傳的資料夾吧....謝謝..謝謝..再謝謝..拜託各位大大的幫助了...會幾題就幫我們幾題吧...謝謝..
http://my.so-net.net.tw/dada1222/TEST.pdf

1.用google查網路七層osi的session layer及presentation layer的功能
2.用google查bit rate及baud rate的定義,再來計算
3.用google查NRZ及曼徹斯特的編碼定義,再來畫圖
4.用google查單一呼叫,群呼及廣播有何不同
5.用google查單工,半雙工,全雙工是何功能
6.用google查網路mac(媒體存取控制)的功能,再來解釋為何可以判別特定電腦
7.用and邏輯與255.255.192.0做運算看結果是否為0,0,0,0........若是....則.....嗯..忘了...用google查
8.用google查osi的七層定義再對映到TCP/IP看查誤及剔除的功能歸屬於誰


以上答案若有錯誤,以專家的回答為準


問題大大,可否請問你老姐是哪間學校,啥科系的?