Ports to be used for pxe boot
ISC DHCP 4.4 Manual Pages - dhcpd.conf - ISC DHCP 4.4 Jan 22, 2020 Configuring a DHCP Server The DHCP server transmits responses to the DHCP clients at a port number one greater than the UDP port specified. For example, if the default port 67 is used, the server listens on port 67 for requests and responses to the client on port 68. Change TCP/IP settings - Windows Help
The port numbers from 0 to 1024 are known as well known ports and are used for specialized services or privileged services. For example as mentioned in the table below port 80 is used for HTTP while ftp port number is 21 etc. Table of Port numbers used for FTP, TELNET, HTTP, SMTP, POP3, IMAP, BIOS, SSH, DHCP protocols. Port numbers are pre
List of Well-Known TCP Port Numbers - Webopedia Reference Nov 02, 2017
Configuring a DHCP Server
May 21, 2019 A Basic Guide to Configuring DHCP Failover - ISC DHCP Jan 15, 2019