Ask Question, Ask an Expert


Ask Computer Network & Security Expert

Answer the following problems.

problem 1) Consider the two basic approaches identified toward achieving multicast: unicast emulation and network-layer-multicast. Consider a sender and 32 receivers. Assume that sender is connected to the receiver through a binary tree of routers. What is the cost of sending a multicast packet, in the case of unicast emulation and network-layer multicast, for this topology? Suppose that every time a packet (or a copy of the packet) traverses a link, it incurs a cost C. What topology for interconnecting the senders, receivers, and routers will bring the cost of unicast emulation and network-layer multicast as far apart as possible? You can choose as many routers as you like.

problem 2) As a possible congestion control mechanism in a subnet using virtual circuits internally, a router could refrain from acknowledging a packet until

(i) it knows its last transmission along virtual circuit was received successfully, and

(ii) it has a free buffer.

For simplicity, suppose that routers use a stop-and-wait protocol and that each virtual circuit has one buffer dedicated to it for each direction of traffic. If it takes T seconds to transmit a packet (data or acks) and there are n routers on the path, what is the rate at which packets are delivered to the destination host? Suppose that transmission errors are rare, and the host router connection is infinitely fast.

problem 3) Why does UDP exist? Would it not have been sufficient to let applications send raw IP packets?

problem 4) Consider idealized model for the steady-state dynamics of TCP: the average throughput of connection in the period where the congestion window varies from (W*MSS)/2 to W*MSS is (0.75 * W * MSS)/RTT. In this circumstances, suppose that only one packet is lost at the very end of each period. Demonstrate that the loss rate is equal to L = 1/[ 3/8 * W*W + 3W/4]

Computer Network & Security, Computer Science

  • Category:- Computer Network & Security
  • Reference No.:- M96675

Have any Question? 

Related Questions in Computer Network & Security

Write answer to each question - two paragraphs for each

Write answer to each question - two paragraphs for each question with single spaces. Format : Single Spaced Strong Paragraphs Two paragraphs for each question Times New Roman - 12 subject: Data Communication and Network ...

Management is pleased with the progress that has been made

Management is pleased with the progress that has been made and likes the steps you have taken to set up a secured network environment. During the last status meeting, it was asked, has everything been done that is possib ...

Questions-q1 write short note on1 gigabit ethernet2 fiber

Questions- Q1. Write short note on: 1. Gigabit Ethernet 2. Fiber Distributed Data Interface (FDDI) Q2. Define and explain address resolution protocol (ARP). Describe ARP packet generation. Q3. What is the use of TCP cong ...

Project- sample cyber security profileevery organization

Project- Sample Cyber Security Profile Every organization must create a cybersecurity profile (system security plan (SSP)) for all of its major and minor information systems. The cybersecurity profile documents the curre ...

Assignment overviewpurpose of the assessmentthe purpose of

Assignment Overview Purpose of the assessment: The purpose of this assignment is to develop skills to identify appropriate network security tools for various operating systems. Students will also have opportunity to expl ...

Assignment big switch network designbig switch is a

Assignment: Big Switch Network Design Big Switch is a medium-sized sales organization with 100 employees with annual revenue of $10 million. Big Switch has a central office of 30 employees that supports a sales force con ...

A cipher can be created by using a keyword for example if

A cipher can be created by using a keyword. For example, if we choose "statistic" as our keyword, our cipher would be determined as follows: Method I. Write the word "statistic" without the repeated letters. Then complet ...

Any encryption algorithm like caesar cipher algorithmshould

Any Encryption algorithm (like caesar cipher algorithm)should be used and implemented for the information given in the document. Cryptography Assignment Given the following S-Boxes: S1= [ 15        10            2        ...

Assignment a complete home networkdevelop an entire home

Assignment: A Complete Home Network Develop an entire home network with a budget of $5,000.00. Your configuration must assume the purchase of associated hardware for access to both wireless and wired connections and a br ...

Discussion boardthis module goes into the various types of

Discussion board This module goes into the various types of storage devices used for hosting and backing up files. Cloud computing offers an exciting opportunity for computer users in terms of storage. What products or s ...

  • 4,153,160 Questions Asked
  • 13,132 Experts
  • 2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

A cola-dispensing machine is set to dispense 9 ounces of

A cola-dispensing machine is set to dispense 9 ounces of cola per cup, with a standard deviation of 1.0 ounce. The manuf

What is marketingbullwhat is marketing think back to your

What is Marketing? • "What is marketing"? Think back to your impressions before you started this class versus how you

Question -your client david smith runs a small it

QUESTION - Your client, David Smith runs a small IT consulting business specialising in computer software and techno

Inspection of a random sample of 22 aircraft showed that 15

Inspection of a random sample of 22 aircraft showed that 15 needed repairs to fix a wiring problem that might compromise

Effective hrmquestionhow can an effective hrm system help

Effective HRM Question How can an effective HRM system help facilitate the achievement of an organization's strate