====== Core Packages ======

The [[:download|Click distribution]] comes with more than 400 elements.  These elements are divided into groups, such as ''standard'', ''ip'', and ''wifi''.  Some of the groups are enabled by default; others can be selected at configuration time with options like ''./configure --enable-wifi''.  The resulting Click binary will not contain elements from disabled groups.

^ Group Name ^ Description ^ Enabled By Default? ^
| analysis | Network measurement and analysis |  No  |
| app | Application-level elements |  Yes  |
| aqm | Active queue management |  Yes  |
| bsdmodule | BSD kernel module support |  Driver-specific  |
| ethernet | Ethernet |  Yes  |
| etherswitch | Ethernet switch |  No  |
| grid | Grid ad-hoc networking location service |  No  |
| icmp | ICMP |  Yes  |
| ip | IPv4 |  Yes  |
| ip6 | IPv6 |  No  |
| ipsec | IPsec |  No  |
| linuxmodule | Linux kernel module support |  Driver-specific  |
| local | Experimental elements, your elements |  No  |
| ns | ns simulator support |  Driver-specific  |
| radio | Radio support (obsolete) |  No  |
| simple | Simple versions of other elements |  No  |
| standard | Basic element complement |  Yes  |
| tcpudp | TCP and UDP |  Yes  |
| test | Regression tests |  No  |
| userlevel | User-level support |  Driver-specific  |
| wifi | 802.11 wireless networking |  No  |