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by: Adriel Romaguera


Adriel Romaguera
Virginia Commonwealth University
GPA 3.86

Ju Wang

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Ju Wang
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This 3 page Study Guide was uploaded by Adriel Romaguera on Wednesday October 28, 2015. The Study Guide belongs to CMSC 506 at Virginia Commonwealth University taught by Ju Wang in Fall. Since its upload, it has received 63 views. For similar materials see /class/230652/cmsc-506-virginia-commonwealth-university in ComputerScienence at Virginia Commonwealth University.

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Date Created: 10/28/15
CMSC506 study guide for nal exam Question format 0 Term explanations eg what is CSMACD 0 Short question eg what is the hidden node problem and what causes this problem Simple math and terminology e g calculating effective data rate for Ethernet Protocol tracing Explain binary countdown algorithm and its motivation 0 Scope What is binary exponential backoff algorithm Where is it being used 0 Mostly after midterm 0 Network Layer Chapter 5 Mainly on 52 and 56 O O O O O 0 Routing Related Topics The fundamental routing scheme is storeandforward 522 Should be able to stepbystep construct Shortest Path Routing path for a given graph You should be very familiar with Figure 57 523 The pros and cons of ooding How to improve it 524 Distance Vector Routing focus on updating process The main drawback of DVR counttoinfinity problem 525 Link state Routing each node will calculate routing table when received enough information Notice how link stage packet is defined and passed around 526 Hierarchical routing able to determine the size of routing table when the hierarchical structure is given 0 000 O 0 527 Broadcasting routing spanning tree and reverse path forwarding Internet Related Topics 5567 Intemetwork routing Fragmentation 561 understand various fields in IPv4 header such as TTL and MF The IP routing options strict and loose source and their functionality When studying these always ask yourself why a particular IP feature is their 562 Subnet and netmask 563 ICMP types ARP and RARP Keep in mind that these are 1P level protocols But the functionalities of ARP and RARP is to translate IP and MAC address 568 IPv6 Difference when compared to IPv4 Media Access Layer mainly at 41 42 43 44 45 and some subsection in 46 and 47 Understand three types of access methods 0 O 0 Fixed channel allocation FDMA TDMA Often centralized Dynamic allocation with collision ALOHA CSMACD CSMACA Dynamic allocation and collisionfree bitmap binary countdown 0 411 and 412 basic concepts and terms 421 the difference between pure aloha and slotted aloha The vulnerable period 422 CSMA and several variations Persistent or not Augmented by collision detection Figure 45 423 collision free protocols pros and cons Efficiency calculation 426 wireless properties range hidden node and eXposed node MACA collision avoidance CMSC506 study guide for midterm exam Question format 0 Term explanations eg what is local area network LAN 0 Short question eg what is the functionality of NIC What layer it belongs to o What is the protocol What is OSI model What is the purpose of layered structure Simple math and terminology eg conversion among kbps mbps Calculate bandwidth or delay latency Lesssimple math eg calculate CRC code Calculate simple probability Need to think more analysis data link protocol could be a variation of what we learned Scope 0 Intro Chapter 1 excluding 152 16 o Phy layer Chapter 2 excluding 24 254 26 27 0 Characteristic of different physical media phone line wireless fiber cable water 0 Understand physical factor in communication such as noise attenuation o Bandwidth calculation formular 0 Different modulation types 0 Data linker layer Chapter 3 excluding 35 36 37 0 Flow control Error control Hamming distance codedecoding examples CRC code Sliding window data link protocol protocol 1 to 6 39 Understand the pseudocode O O O O


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