路由器是工作在第三层(网络层)上的网络设备,它将网段或整个网络连接起来。路由器基于第三层地址对数据包进行转发。路由器具有一定的智能,能够决定在网 络上转发数据包的最佳路径

调制解调器结合了数据通信和计算机技术,用于数据通信的一个重要设备,在 网络连接和远程访问方面也起着重要作用。 调制解调器主要用于在模拟线路上传输数字信息

一、计算机网络的产生和发展 二、计算机网络的概念 三、计算机网络的功能 四、计算机网络的分类 五、计算机网络体系结构

You may use one 8.5 11\sheet with notes in you own handwriting on both sides but no other sources of information Calculators are not allowed You may assume all results from lecture, the notes, problem sets, and recitation Write your solutions in the space provided. If you need more space, write on the back of the sheet containing the probl

YOUR NAME Calculators are not allowed on this exam You may use one 8.5 x 11\sheet with notes in your own handwriting on both side but no other sources of information You may assume all results from lecture, the notes, problem sets, and recitation

Problem Set 10 Solutions Due: Monday, May 2 at 9 PM Problem 1. Justify your answers to the following questions about independence. (a)Suppose that you roll a fair die that has six sides, numbered 1, 2, ... 6. Is the event that the number on top is a multiple of independent of the event that the number on top is a multiple of 3?

Srini Devadas and Eric Lehman Problem Set 7 Solutions Due: Monday, April 4 at 9 PM Problem 1. Every function has some subset of these properties: injective

Problem 1. Sammy the Shark is a financial service provider who offers loans on the fol lowing terms. Sammy loans a client m dollars in the morning This puts the client m dollars in debt to Sammy. Each evening, Sammy first charges\service fee\, which increases the client's debt by f dollars, and then Sammy charges interest, which multiplies the debt by a factor

Problem Set 4 Solutions Due: Monday, February 28 at 9 PM Problem 1. Prove all of the following statements except for the two that are false; for those, provide counterexamples. Assumen 1. When proving each statement, you may assume all its predecessors (a)a =(mod n) Solution. Every number divides zero, so n (a-a), which means a a (mod n). (b)a≡b(modn) impliesa(modn)

Problem set 2 Solutions Due: Monday, February 14 at 9 PM Problem 1. Use induction to prove that n/n for alln olution. The proof is by induction on n. Let P(n) be the proposition that the equation Base case. P(2 )is true because Inductive step. Assume P(n)is true. Then we can prove P(n +1)is also true as follows