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    "<div style=\"background-color:rgba(100, 160, 200, 0.33);\">\n",
    "\n",
    "<h1>Tutorial 1 - Introduction</h1>\n",
    "\n",
    "<p>\n",
    "Submission process:\n",
    "</p>\n",
    "<ul>\n",
    "<li>Submission deadline is November 5, 14:00 CET (before the lecture) .</li>\n",
    "<li>Commit and push your solution as separate notebook files per subtask via git as <span style=\"font-family: monospace\">./tutorial/tutorial1/tutorial1_2.ipynb</span>. Please take care of the correct subfolder/filename since submission is denied otherwise.</li>\n",
    "<li>During the first lecture after the deadline we will discuss a sample solution in class.</li>\n",
    "<li>Afterwards, you have time until November 10, 16:00 CET (before the lecture) to submit a corrected version of your submission:</li>\n",
    "<ol>\n",
    "  <li>Rework your solution according to our discussion in class.</li>\n",
    "  <li>Commit and push the corrected version as a separate file per subtask via git as <span style=\"font-family: monospace\">./tutorial/tutorial1/tutorial1_2.ipynb</span>. Please take care of the correct filename since submission is denied otherwise.</li>\n",
    "</ol>\n",
    "</ul>\n",
    "\n",
    "<p>\n",
    "Remarks:\n",
    "</p>\n",
    "<ul>\n",
    "<li>Grading is done based on both versions of your submission.</li>\n",
    "<li>If the first submission is missing or contains major flaws a deduction of up to 50% of the achieved points will be applied</li>\n",
    "<li>A sample solution is provided after November 10, 16:00 CET eventually.</li>\n",
    "<li>Do NOT duplicate cells or change the type of cells, otherwise you might receive zero points for your submission</li>\n",
    "<li>\n",
    "Please use <a href=\"mailto:acn@net.cit.tum.de\">acn@net.cit.tum.de</a> for questions regarding lecture, tutorial, and project of ACN.\n",
    "</li>\n",
    "</ul>\n",
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    "    <p>This cell is used to verify the structure of the submission </p>\n",
    "    DO NOT DELETE OR CHANGE THIS CELL, otherwise the task will be graded with 0 points\n",
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    "<div style=\"background-color:rgba(100, 160, 200, 0.33);\">\n",
    "<h3>Problem 2 SSH and Virtual Machine (VM) Access [3.0 credits]</h3>\n",
    "\n",
    "<p>\n",
    "If you can see this notebook you probably followed directions from the <a href=\"https://acn.net.in.tum.de/exercise/instructions.pdf\">infrastructure introduction</a>.\n",
    "To hand in your answers, please write them down in the prepared cells.\n",
    "</p>\n",
    "\n",
    "</div>"
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    "<div style=\"background-color:rgba(100, 160, 200, 0.33);\">\n",
    "<p>\n",
    "<b>a) [0.5 credits]</b> What is SSH and what it is being used for?\n",
    "</p>\n",
    "</div>"
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   "source": [
    "YOUR ANSWER HERE"
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    "<div style=\"background-color:rgba(100, 160, 200, 0.33);\">\n",
    "<p>\n",
    "<b>b) [0.5 credits]</b> What is the difference between public-key and password authentication as offered by SSH?\n",
    "</p>\n",
    "</div>"
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    "<div style=\"background-color:rgba(100, 160, 200, 0.33);\">\n",
    "<p>\n",
    "<b>c) [1.0 credits]</b>\n",
    "SSH can be used to connect to your testbed VM and execute code (e.g., Jupyter).\n",
    "    \n",
    "You can connect to your VM (in this case we use the host i1-router0) using the command:\n",
    "<p style=\"font-family: monospace\">ssh -L localhost:1337:localhost:1337 -J testbed.acn.net.cit.tum.de root@i1-router0</p>\n",
    "Explain in detail what each part in this command does.\n",
    "</p>\n",
    "</div>"
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   "source": [
    "<p style=\"font-family: monospace\">ssh -L localhost:1337:localhost:1337 -J testbed.acn.net.cit.tum.de root@i1-router0</p>\n",
    "\n",
    "* <span style=\"font-family: monospace\">ssh -L</span>:\n",
    "  YOUR ANSWER HERE\n",
    "* <span style=\"font-family: monospace\">localhost:1337:localhost:1337</span>:\n",
    "  YOUR ANSWER HERE\n",
    "* <span style=\"font-family: monospace\">-J testbed.acn.net.cit.tum.de</span>:\n",
    "  YOUR ANSWER HERE\n",
    "* <span style=\"font-family: monospace\">root@i1-router0</span>:\n",
    "  YOUR ANSWER HERE\n"
   ]
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   "source": [
    "<div style=\"background-color:rgba(100, 160, 200, 0.33);\">\n",
    "<p>\n",
    "<b>d) [1.0 credits]</b>\n",
    "Connect to your virtual machine using SSH and execute the following three commands:\n",
    "    \n",
    "* <span style=\"font-family: monospace\">whoami</span>\n",
    "* <span style=\"font-family: monospace\">uname -a</span>\n",
    "* <span style=\"font-family: monospace\">pwd</span>\n",
    "    \n",
    "Paste the output of each of the three commands into your answer and explain what each command does.\n",
    "</p>\n",
    "</div>"
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    "\n",
    "\n",
    "* <b>whoami:</b> \n",
    "YOUR ANSWER HERE\n",
    "\n",
    "* <b>uname -a:</b> \n",
    "YOUR ANSWER HERE\n",
    "\n",
    "* <b>pwd:</b> \n",
    "YOUR ANSWER HERE\n",
    "\n",
    "\n"
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   "source": [
    "<div style=\"background-color:rgba(100, 160, 200, 0.33);\">\n",
    "<p><b>Advanced Computer Networking by Prof. Dr.-Ing. Georg Carle</b></p>\n",
    "Teaching assistants: Christian Dietze, Sebastian Gallenmüller, Marcel Kempf, Lorenz Lehle, Patrick Dirks, Oliver Dürer\n",
    "</div>"
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