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\title{DT154G -- Nätverksteknik B\\
Homework 1 -- The Overhaul}

\author{Förnamn Efternamn\footnote{%
  E-post: \href{mailto:studentid@student.miun.se}{studentid@student.miun.se}.
}
}
\date{\today}

\begin{document}
\maketitle

\section*{The Overhaul}
\label{sec:Introduction}
This homework assignment is part of the first half of the course Network
Technology B.

The following grading criteria applies:
\begin{math}
  F < 50\% \leq Fx < 60\% \leq P
\end{math}
with no question awarded zero points.

\section{Reading instructions}
Before starting Homework 1, you must have read up to and including Chapter 8 in
\cite{2014snc}, and attended or read the lectures from the first part of this 
course.

\section{Tasks}
This section contains the tasks of this homework assignment.
\label{sec:Tasks}
\qformat{\thequestion. \textbf{\thequestiontitle} \hfill}

\begin{questions}
  \titledquestion{Switch overhaul}[]
  The first thing you want to take care of is the switch-situation. You need to
  invest in switches that support VLANs and various STP-protocols so that you
  can ensure layer 2 redundancy.
  \begin{parts}
    \part[1] Start by describing the benefits of layer-2 redundancy.
    \begin{solution}
       \ldots %Your answer %Your answer
    \end{solution}

    \part[1] Write down the consequences of layer-2 loops.
    \begin{solution}
       \ldots %Your answer %Your answer
    \end{solution}
    \part[2] Give a brief explanation of how PVST+ works.
    \begin{solution}
       \ldots %Your answer
    \end{solution}
  \end{parts}

  \titledquestion{Improving the Wireless}[]
  Once the application for getting new switches is sent off, its time to start
  begging for some more money, this time for new wireless equipment.
  \begin{parts}
    \part[1] Give a brief overview of the different wireless EThernet standards
    available. Speed, frequencies and various features.
    \begin{solution}
       \ldots %Your answer
    \end{solution}
    \part[1] You should also explain to the boss about the three organisations
    that have an influence in WLAN standards
    \begin{solution}
       \ldots %Your answer
    \end{solution}
    \part[1] When planning how a WLAN should be set up, you really need to use
    correct terminology, hence you can not expect the boss to understand
    anything unless you also explain about \emph{BSS}, \emph{ESS} and \emph{DS}.
    \begin{solution}
       \ldots %Your answer
    \end{solution}
    \part[2] When using switched ethernet you really do not have any problems
    with collisions any more, due to the fact that switches separates the
    network into very small collision domains. However, wireless networks cannot
    achieve this, so how how do wireless networks avoid collisions and ensure
    access control in the physical layer?
    \begin{solution}
       \ldots %Your answer
    \end{solution}
    \part[3] One of the questions you sent to the boss for the intern to answer
    was about how digital data is represented in ethernet. How does it work in
    Wireless networks? Write down a few sentences about the different Frequency
    Channel Saturation schemes (DSSS, FHSS, OFDM)
    \begin{solution}
       \ldots %Your answer
    \end{solution}
  \end{parts}

  \titledquestion{What about the routers}[]
  You are thinking about what to do about the routers. The topology as it is
  now, is not a very long term solution. There are excessively many low
  quality WAN-links and you should also be able to reduce the number of routers
  and use layer-3 switches instead. You are thinking about running OSPF or
  EIGRP as an IGP. It was a long time ago you read about this area, so its
  time to hit the books and refresh your knowledge. The intern actually gave
  you some good ideas for how to fix the WAN situation during your encounter in
  the fika room.

  \begin{parts}
    \part[1] In OSPF there were this problem with multi-access networks and
    creating unnecessary adjacencies. Before even considering OSFP, you should
    look up the details of this. Explain the problem with running OSPF in a
    multi-access network, where you will have multiple adjacencies with
    routers placed within the same subnet.
    \begin{solution}
       \ldots %Your answer
    \end{solution}
    \part[2] How does OSPF solve this problem? Make sure to mention the election
    process of DR and BDR and how to control which router becomes the DR or BDR.
    \begin{solution}
       \ldots %Your answer
    \end{solution}
    \part[2] How about that neat feature OSPF has with multi-area networks.
    Explain the need for multi-area networks and also the four types of
    routers that can be involved in this.
    \begin{solution}
       \ldots %Your answer
    \end{solution}
  \end{parts}

  \titledquestion{What about the routers \MakeUppercase{\romannumeral 2}}[]
  It's a good idea to not stare blindly on a single protocol. You
  remember reading about this EIGRP protocol a long time ago. Maybe this is
  suitable for your WAN-network?
  \begin{parts}
    \part[2] What are the main characteristics of the EIGRP-routing protocol?
    \begin{solution}
       \ldots %Your answer
    \end{solution}
    \part[2] OSPF are using this SPF algorithm to find the best way to a
    destination, how about EIGRP, how does it find the best route?
    \begin{solution}
       \ldots %Your answer
    \end{solution}
    \part[2] EIGRP use this system based upon successor, feasible successors,
    feasible distance and reported distance to ensure the loop-free routes.
    Explain how this system works.
    \begin{solution}
       \ldots %Your answer
    \end{solution}
    \part[2] Both EIGRP and RIP are distance vector routing protocols that
    have their own mechanisms to ensure that a route is loop-free. Which one
    do you think is better? And why?
    \begin{solution}
       \ldots %Your answer
    \end{solution}
  \end{parts}

\end{questions}

\section{Submissions}
\label{sec:submission}
Before submitting, make sure that your solutions follow the criteria given in
\prettyref{sec:Examination}.
Your solutions to all the numbered questions must be submitted in
\emph{PDF-format}. 
\bibliography{../../literature}

\end{document}
