LPIC-1 109.1: Internet protocol fundamentals

Subnets worked out by hand, well-known ports, and IPv6 address notation. Nothing here changes the VM: the answers go in files.

Before you start

The lab sets up nothing. Write each answer in /root/lab-answers/.

Work out the network, broadcast, first and last host for 10.1.2.3/23, 172.16.40.200/27 and 192.168.5.5/30 on paper, then check with ipcalc (install the ipcalc package if needed). Write one line per network to /root/lab-answers/1, in that order, each with four addresses separated by spaces: network, broadcast, first host, last host.
Look up the service names of ten ports from the chapter's table in /etc/services. Write ten lines to /root/lab-answers/2, each a port number and its name as /etc/services gives it, such as 22 ssh.
Write fe80:0000:0000:0000:0204:61ff:fe9d:f156 in its shortest form as the first line of /root/lab-answers/3, and 2001:db8:a::1 expanded to all eight groups of four digits as the second.

A /23 covers two /24s; a /27 is a block of 32 addresses; a /30 a block of 4.
grep -w 53 /etc/services, getent services 53.
Leading zeros in a group can go; one run of zero groups becomes ::.