What do the following eight sentences mean when configuring Cisco Layer 3 switches and access control lists? thank you

The first sentence and the third sentence allow [anyone to communicate with DHCP client] and [anyone to communicate from DHCP client] respectively.

DHCP clients are usually hosts that automatically obtain addresses.

These two permissions allow the process of automatically obtaining addresses.

Eq bootpc is a 68-port. It is udp protocol.

# 103 is the number of the access control list

# Allow or deny permission.

#udp refers to udp protocol, which can also be written as tcp and ip (this is a special place for Cisco, although ip is not at the same level as tcp and udp).

#any refers to any address, or you can write a specific address. The former is the source address and the latter is the destination address.

#eq stands for port number, and eq bootpc = eq 68 can be written in two languages at the same time. No matter what is written in the configuration, the former is displayed.

# The last hidden statement access-list103 deny IP any any is the default statement, which means that all rights except the above rights are denied (the access control list matches from top to bottom).

The second sentence and the fourth sentence allow [anyone to communicate with tftp client/server], and vice versa.

Because both tftp clients and servers use port 69. It is also a udp protocol.

104. Similar.

103 and 104 are two independent access control lists. Look who called.