Quiz and Snack ECS 152B Winter 2006.

Slides:

Advertisements

Similar presentations

Computer Networks20-1 Chapter 20. Network Layer: Internet Protocol 20.1 Internetworking 20.2 IPv IPv6.

Advertisements

CE363 Data Communications & Networking Chapter 7 Network Layer: Internet Protocol.

Network Layer – IPv4 Dr. Sanjay P. Ahuja, Ph.D.

1 o Two issues in practice – Scale – Administrative autonomy o Autonomous system (AS) or region o Intra autonomous system routing protocol o Gateway routers.

Prentice HallHigh Performance TCP/IP Networking, Hassan-Jain Chapter 2 TCP/IP Fundamentals.

CSE551: Computer Network Review r Network Layers r TCP/UDP r IP.

TELE202 Lecture 14 TCP/UDP (2) 1 Lecturer Dr Z. Huang Overview ¥Last Lecture »TCP/UDP (1) »Source: chapter 17 ¥This Lecture »TCP/UDP (2) »Source: chapter.

Week 5: Internet Protocol Continue to discuss Ethernet and ARP –MTU –Ethernet and ARP packet format IP: Internet Protocol –Datagram format –IPv4 addressing.

Network Layer Packet Forwarding IS250 Spring 2010

Transport Layer 3-1 outline r TCP m segment structure m reliable data transfer m flow control m congestion control.

Transport Layer 3-1 Fast Retransmit r time-out period often relatively long: m long delay before resending lost packet r detect lost segments via duplicate.

11- IP Network Layer4-1. Network Layer4-2 The Internet Network layer forwarding table Host, router network layer functions: Routing protocols path selection.

CSIT435 Spring 2001 Final Examination Study Guide.

CS440 Computer Networks 1 Review for Networking Neil Tang 01/16/2009.

Network Layer4-1 IP: Internet Protocol r Datagram format r IPv4 addressing r DHCP: Dynamic Host Configuration Protocol r NAT: Network Address Translation.

CSEE W4140 Networking Laboratory Lecture 6: TCP and UDP Jong Yul Kim

Networking and Internetworking: Standards and Protocols i206 Fall 2010 John Chuang Some slides adapted from Coulouris, Dollimore and Kindberg.

TCP. Learning objectives Reliable Transport in TCP TCP flow and Congestion Control.

5/12/05CS118/Spring051 A Day in the Life of an HTTP Query 1.HTTP Brower application Socket interface 3.TCP 4.IP 5.Ethernet 2.DNS query 6.IP router 7.Running.

Transport Layer TCP and UDP IS250 Spring 2010

Gursharan Singh Tatla Transport Layer 16-May

Introduction 1 Lecture 14 Transport Layer (Congestion Control) slides are modified from J. Kurose & K. Ross University of Nevada – Reno Computer Science.

What Can IP Do? Deliver datagrams to hosts – The IP address in a datagram header identify a host IP treats a computer as an endpoint of communication Best.

The Transport Layer.

IP (Internet Protocol) –the network level protocol in the Internet. –Philosophy – minimum functionality in IP, smartness at the end system. –What does.

CS 381 Final Exam Study Guide Final Exam Date: Tuesday, May 12 th Time: 10:30am -12:30pm Room: SB 105 Exam aid: 8 ½ x 11 page of notes front and back.

1 Chapter 1 OSI Architecture The OSI 7-layer Model OSI – Open Systems Interconnection.

TCP/IP Essentials A Lab-Based Approach Shivendra Panwar, Shiwen Mao Jeong-dong Ryoo, and Yihan Li Chapter 5 UDP and Its Applications.

Fall 2005Computer Networks20-1 Chapter 20. Network Layer Protocols: ARP, IPv4, ICMPv4, IPv6, and ICMPv ARP 20.2 IP 20.3 ICMP 20.4 IPv6.

1 The Internet and Networked Multimedia. 2 Layering  Internet protocols are designed to work in layers, with each layer building on the facilities provided.

1 Transport Protocols Relates to Lab 5. An overview of the transport protocols of the TCP/IP protocol suite. Also, a short discussion of UDP.

Review the key networking concepts –TCP/IP reference model –Ethernet –Switched Ethernet –IP, ARP –TCP –DNS.

Internetworking Internet: A network among networks, or a network of networks Allows accommodation of multiple network technologies Universal Service Routers.

1 Mao W07 Midterm Review EECS 489 Computer Networks Z. Morley Mao Monday Feb 19, 2007 Acknowledgement: Some.

CS244A Midterm Review Ben Nham Some slides derived from: David Erickson (2007) Paul Tarjan (2007)

Transport Layer3-1 Chapter 4: Network Layer r 4. 1 Introduction r 4.2 Virtual circuit and datagram networks r 4.3 What’s inside a router r 4.4 IP: Internet.

EEC-484/584 Computer Networks Lecture 10 Wenbing Zhao (Part of the slides are based on Drs. Kurose & Ross ’ s slides for their Computer.

Network Layer4-1 Datagram networks r no call setup at network layer r routers: no state about end-to-end connections m no network-level concept of “connection”

Telecommunications Essentials John R. Durrett July 5, 2005.

Midterm Review Chapter 1: Introduction Chapter 2: Application Layer

The Internet Network layer

 1DT014 Datakommunikation I › (Thur) 9-14 › Polacksbacken, Skrivsal  9 Questions › 5 Short questions › 4 Long questions.

Data Communications and Computer Networks Chapter 4 CS 3830 Lecture 19 Omar Meqdadi Department of Computer Science and Software Engineering University.

Final Examination of Internet Communication Protocol.

TCP/IP1 Address Resolution Protocol Internet uses IP address to recognize a computer. But IP address needs to be translated to physical address (NIC).

11 CS716 Advanced Computer Networks By Dr. Amir Qayyum.

1 COMP 431 Internet Services & Protocols The IP Internet Protocol Jasleen Kaur April 21, 2016.

Computer Networks 1000-Transport layer, TCP Gergely Windisch v spring.

CSEN 404 Introduction to Networks Amr El Mougy Lamia AlBadrawy.

Lecture 13 IP V4 & IP V6. Figure Protocols at network layer.

4: Network Layer4-1 Chapter 4: Network Layer r 4. 1 Introduction r 4.2 Virtual circuit and datagram networks r 4.3 What’s inside a router r 4.4 IP: Internet.

Introduction To TCP/IP Networking Mr. Zeeshan Ali, Asst. Professor

Introduction to TCP/IP networking

Internet Protocol (IP) / Transmission Control Protocol (TCP)

Transport Protocols Relates to Lab 5. An overview of the transport protocols of the TCP/IP protocol suite. Also, a short discussion of UDP.

Networking CS 3470, Section 1 Sarah Diesburg

ECE4605: IP & TCP.

Course Review 2015 Computer networks 赵振刚

Magda El Zarki Professor, ICS UC, Irvine

CS 457 – Lecture 10 Internetworking and IP

Network Core and QoS.

Advanced Computer Networks

Chapter 4 Network Layer Computer Networking: A Top Down Approach 5th edition. Jim Kurose, Keith Ross Addison-Wesley, April Network Layer.

Advanced Computer Networks

CS4470 Computer Networking Protocols

16EC Computer networks unit II Mr.M.Jagadesh

EE469 Review 1.

Review of Internet Protocols Transport Layer

Transport Protocols Relates to Lab 5. An overview of the transport protocols of the TCP/IP protocol suite. Also, a short discussion of UDP.

Network Core and QoS.

Presentation transcript:

Quiz and Snack ECS 152B Winter 2006

Multimedia Two Describe an FEC scheme. A three-minute MP3 song occupies how much disk space? Between 1MB to 10MB. Mean compensation for computer-industry professional The January 2006 IT Salary Survey reveals that the mean compensation for computer-industry professionals rose to $74,636 in the last quarter of 2005, slightly up from $69,579 during the final quarter of 2004.

TCP quiz 1 Pipelining is used in Multimedia streaming, persistent HTTP, TCP The RTT between Davis and D.C. is about 48ms without queueing delay The chancellor & Provost of UC Davis Larry Vanderhoef and Virginia Hinshaw

TCP quiz 2 Why does the seq. # in TCP count byte while the seq. # in RTP counts packets? Can we reverse them? Does UDP perform flow control?

TCP Quiz TCP connection establishment SYN= ? , client_ISN=1234 SYN= ? , server_ISN=4321, Ack=? SYN= ? , seq#=? , ack=?

TCP Quiz A TCP flow with short RTT, a TCP flow with long RTT. They share the link of the sender. Which one gets a higher transmission rate? Then consider a TCP flow with short RTT and a UDP flow with long RTT. What are the fields in TCP header? Which fields are the same as UDP?

TCP throughput After three duplicate Acks, a congestion avoidance algorithm reduces its congestion window to cwnd/3. What is the average throughput using this algorithm? Linearly increasing from W/3 to W. Thus, average is 2/3*W/RTT. This TCP is more aggressive.

Congestion Control TCP does AIMD. Can we do MIAD; i.e., to increase multiplicatively and decrease linearly?

IP Quiz What fields in an IP datagram can be changed in an intermediate router? TTL, checksum, possibly some options If fragmentation performed, then fragmentation flag, offset,& length change. Will datagram fragmentation change the sequence number in a TCP segment? No. If a piece of fragmentation is missing, what will happened at TCP layer? Eventually, TCP will timeout or get duplicate acks. Source node will retransmit. In its peak, spam consists of ___% of email traffic as of July 2004. Its share is ___% in July 2005. 94.5%, 64.2%

IP Quiz What is the IP broadcast address? 255.255.255.255 Netid+all 1s. What is the broadcast address of an Ethernet card? FF-FF-FF-FF-FF-FF. Suppose a datagram is 1000byte. The MTU is 500 byte. How many fragments do you need? three (because of the IP header). When was Yosemite established as a National Park? 1890. How many times have u been there?

IP Quiz Where have we discussed tunneling? IPv6/v4 and mobile IP. Name the main changes of IPv6 over v4. Is the network prefix length included in IP header? How could a router tell? What is ICANN? Internet Corporation for Assigned Names and Numbers Allocate IP address, manage DNS root servers.

IP Quiz Which routing algorithm is easier to be used by a malicious router to “crash” Internet, LS or DV? DV. RIP uses ___ and OSPF uses ___ (LS/DV). DV and LS. RIP message is carried over ___, OSPF ___, and BGP over ____. UDP, IP, and TCP, respectively. Suppose there are three closed doors, behind which, one has the final-exam paper, two others have the mid-term paper. Suppose you choose one (not open). Then I open one-door, which has mid-term paper. Do you want to switch your selection now? Yes. A 2/3 probability of seeing the final exam paper now if you switch.

IP Broadcast and multicast use ____ (UDP/TCP). Why? What are the subnet IDs in CS? 192.168.1.0/24 169.237.6.0/24 How long is the current-known largest prime? Over 6M digits! A network of 200,000 computers over two years.