getting dhcp package

[Kevin Lee]

Hi,     I wonder what kind of dhcp package I need to install to make my network work.  There are 5 packages found at package list for the stable distribution of debian: stable  dhcpcd 1:1.3.17pl2-8   (36.3k)     DHCP client for automatically configuring IPv4 networking stable  dhcp-relay 2.0pl4-2   (136.4k)     DHCP Relay stable  dhcp-client 2.0pl4-2   (183.5k)     DHCP Client stable  dhcp-dns 0.50-3   (9.9k)     Dynamic DNS updates for DHCP stable  dhcp 2.0pl4-2   (195.4k)     DHCP server for automatic IP address assignment   Do I need a server or client or both?  Mm, I guess just client.  What's DHCP Relay?  Anyone knows?     Kevin