CSED353(Computer Network)

Objective

Today, Internet access is considered a basic human right.
Nearly every computer, mobile device, and even wearable that we interact with on a daily basis are connected over the network. We cannot imagine a computer without a network; we cannot imagine our life without a networked computer.

In this light, this course is designed to help the students learn from mainly three dimensions as follows:

1. Lectures.

• We will discuss basic principles and topics of fundamental concepts concerning the technology and architecture of the Internet. Topics to be covered mainly in this course will include IP, TCP/UDP, and Internet applications.
• The lectures will also feature advanced topics, namely "network beyond connectivity", where we will taste modern case studies that utilize the network as a physical sensor, a privacy defender, a social facilitator, and so on.

2. Brand-new Assignments.

• As of 2022, this course will feature whole re-designed assignments. These assignments will guide the students to develop hands-on technical experiences by building the key mechanisms of the protocols making modern computers talk to each other.

3. Global Industry.

• A specially invited POSTECH graduate (now working for a tech giant in Silicon Valley) will offer a guest lecture on the cutting-edge global networking industry.
• This guest lecture is to broaden the eyes of our fellow POSTECH juniors, to depict a career path that may be yours one day, and to give a crisp purpose for learning networks.

Professor

Name: Inseok Hwang
Homepage: HTTPS://WWW.HIS-LAB.ORG

Grading Policy

Mid-term 20%
Final 25%
Programming assignments 35%
Written assignments & quizzes 10%
Interactivity and participation 10%

References

• Computer Networking – A Top-Down Approach by J. F. Kurose and K. W. Ross, 8th edition. (Global edition) Pearson.
• Additional materials will be provided if necessary

Lecture Schedule

• Overview of computer network
• Understanding of layers
  • Application layer
  • Transport layer
  • Network layer
  • Data link layer
• Special guest lecture on networking: to be offered by a POSTECH graduate now working for a major tech giant in Silicon Valley
• Advanced topics on networking: computer networking as a physical sensor, a privacy defender, and a social facilitator

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CSED353 Lab Assignments

For build prereqs, see the VM setup instructions.

Sponge quickstart

To set up your build directory:

$ mkdir -p <path/to/sponge>/build
$ cd <path/to/sponge>/build
$ cmake ..

Note: all further commands listed below should be run from the build dir.

To build:

$ make

You can use the -j switch to build in parallel, e.g.,

$ make -j$(nproc)

To test (after building; make sure you've got the build prereqs installed!)

$ make check_labN *(replacing N with a checkpoint number)*

The first time you run make check_lab..., it will run sudo to configure two TUN devices for use during testing.

build options

You can specify a different compiler when you run cmake:

$ CC=clang CXX=clang++ cmake ..

You can also specify CLANG_TIDY= or CLANG_FORMAT= (see "other useful targets", below).

Sponge's build system supports several different build targets. By default, cmake chooses the Release target, which enables the usual optimizations. The Debug target enables debugging and reduces the level of optimization. To choose the Debug target:

$ cmake .. -DCMAKE_BUILD_TYPE=Debug

The following targets are supported:

• Release - optimizations
• Debug - debug symbols and -Og
• RelASan - release build with ASan and UBSan
• RelTSan - release build with ThreadSan
• DebugASan - debug build with ASan and UBSan
• DebugTSan - debug build with ThreadSan

Of course, you can combine all of the above, e.g.,

$ CLANG_TIDY=clang-tidy-6.0 CXX=clang++-6.0 .. -DCMAKE_BUILD_TYPE=Debug

Note: if you want to change CC, CXX, CLANG_TIDY, or CLANG_FORMAT, you need to remove build/CMakeCache.txt and re-run cmake. (This isn't necessary for CMAKE_BUILD_TYPE.)

other useful targets

To generate documentation (you'll need doxygen; output will be in build/doc/):

$ make doc

To format (you'll need clang-format):

$ make format

To see all available targets,

$ make help