## 3 Methodology and Criteria for a Comparative Evaluation of the Guidelines
### Survey Evaluation
#### 3.3.2 Importance Ratings for Subcategories  
The second part of the survey was aimed to establish ratings for the subcategories. Pairwise comparisons were not reasonable for all categories, since this would have tremendously increased the \begin{table}
\begin{tabular}{l l} \hline
**Category** & **Weight** \\ \hline DHCPv6 and Autoconfiguration & 0.21 \\ IPv6 Specification and Address format & 0.22 \\ Routing and DNS & 0.24 \\ Transition Methods & 0.20 \\ IPsec and ICMPv6 & 0.14 \\ \hline \end{tabular}
\end{table} 
Table 4: Category weights (n = 34). \begin{table}
\begin{tabular}{l|l l l l l} \hline  & **C1** & **C2** & **C3** & **C4** & **C5** \\
**C1** & 0.20 & 0.32 & 0.18 & 0.18 & 0.16 \\
**C2** & 0.13 & 0.21 & 0.29 & 0.23 & 0.22 \\
**C3** & 0.26 & 0.16 & 0.23 & 0.29 & 0.23 \\
**C4** & 0.21 & 0.17 & 0.15 & 0.19 & 0.25 \\
**C5** & 0.18 & 0.14 & 0.14 & 0.11 & 0.14 \\ \hline \end{tabular}
\end{table} 
Table 3: Normalized comparison rating matrix (n = 34). survey time. Thus participants were asked to rate the importance of the subcategories for a secure deployment guide of IPv6 using a scale from 1 to 10 where 10 represents the highest value, while 1 is the lowest rating. Averages were calculated from the results, and the outcomes were ranked for each category as well as overall (see Table 5). In the category _IPv6 Specification and Address Format_ all subcategories are rated above five on average. Most important is the category _Address Types and Scopes_, followed by _Extension Header Format_ and _IPv6 Main Header Format_. _Address Format & Textual Representation_ and _Mobile IPv6_ are of minor importance in this category but also overall. _Address Types and Scopes_ even came in second in the overall ranking and thus is the second most important subcategory of IPv6. \begin{table}
\begin{tabular}{l c c c} \hline \multicolumn{4}{l}{**IPv6 Specification and Address Format**} \\ \hline IPv6 Main Header Format & 6.03 & 3 & 13 \\ Extension Header Format & 6.07 & 2 & 12 \\ Address Format \& Textual Representation & 5.72 & 5 & 20 \\ Address Types and Scopes & 6.69 & 1 & 2 \\ Mobile IPv6 & 5.76 & 4 & 19 \\ \hline
**IPsec and ICMPv6** & & & \\ \hline Cryptographic Mechanisms & 5.69 & 4 & 21 \\ IKEv2 & 5.66 & 5 & 23 \\ Path Maximum Transmission Unit(PMTU) & 6.0 & 3 & 17 \\ Neighbor Discovery & 6.59 & 1 & 5 \\ ICMPv6 Specification and Header Format & 6.03 & 2 & 13 \\ \hline
**DHCPv6 and Autoconfiguration** & & & \\ \hline DHCPv6 & 6.66 & 1 & 3 \\ Stateless Autoconfiguration & 6.28 & 2 & 10 \\ \hline
**Routing and DNS** & & & \\ \hline DNSSEC & 5.69 & 4 & 21 \\ DNS Security Issues & 6.62 & 1 & 4 \\ DNS for IPv6 Specification & 6.03 & 2 & 13 \\ Routing Protocols (BGP, RIPng, OSPv3) & 6.03 & 2 & 13 \\ Protocol Independent Multicast(PIM) & 4.62 & 6 & 25 \\ Multihoming & 5.0 & 5 & 24 \\ \hline
**Transition Methods** & & & \\ \hline Tunneling Methods & 6.38 & 2 & 8 \\ Translation Methods & 6.21 & 3 & 11 \\ Dual Stacking & 7.38 & 1 & 1 \\ \hline
**IDS/IPS/Firewalling** & & & \\ \hline DPI & 6.0 & 4 & 17 \\ EH Support & 6.48 & 2 & 7 \\ ICMPv6 Handling & 6.56 & 1 & 6 \\ Ingress/Egress Filtering & 6.33 & 3 & 9 \\ \hline \end{tabular}
\end{table} 
Table 5: Rating results for subcategories (n = 27). The subcategories of _IPsec and ICMPv6_ were also all rated above five. ND is most important in this category, followed by the _ICMPv6 Specification and Header Format_ and PMTU. _Cryptographic Mechanisms_, and as one of these _IKEv2_, are least important in this category and also overall. ND became fifth in the overall ranking and thus has high, but not a leading importance overall. _DHCPv6 and Autoconfiguration_ is a category with only two subcategories. One is the _DHCPv6 Specification_, which ranked above the second _Stateless Autoconfiguration_. Both got into the top ten in the overall ranking and thus are important IPv6 topics, with the _DHCPv6 specification_ even coming in third place. _DNS Security Issues_ is the most important subcategory in the category _Routing and DNS_ and became fourth in the overall ranking.