Ports
Application Layer Protocols
IP Address Classes
A Little Bit of Hex
MISC
100

Formed when port numbers are combined with IPs

What is a socket?

100

List of mail servers that accept email for a given Internet Domain

What is DNS?

100

1st Octet Decimal Range 192-223

What is Class C?

100

Symbol for 4 binary bits turned on in Hexadecimal

What is F?

100

Automatic Private IP Address of 169.254.0.0 /16

What is APIPA?

200

Port 23

What is Telnet

200

Identified using URIs or URLs

What is Hyper-Text Transfer Protocol (HTTP)

200

1st Octet Decimal Range 1-126

What is Class A

200

Hexadecimal symbol that represents 13

What is D?

200

127.0.0.1

What is Loopback?

300

FTP Port Number

What is 21?

300

Provides authentication and encrypted communication and is widely used on the World Wide Web for security-sensitive communication

What is HTTP Over Secure Socket Layer?

300

1st Octet Decimal Range for Class B

What is 128 – 191?

300

If Binary is 1010, Hex equals...

What is A?

300

All ones in the host portion of the address

What is Broadcast Address?

400

DNS Port; Port 25

What is 53 and SMTP?

400

Does not encrypt or protect data whilst in transit across network; does not guarantee identity of the sender or receiver

What is File Transfer Protocol?

400

Reserved for Multicasting

Class D

400

Binary bits 1100 represent which hex character?

What is C?

400

Breaks a single class A, B, or C network into smaller pieces

What is a subnet mask?

500

Dynamically assigned Port Numbers 1024 and above

What are ephemeral Ports?

500

Typical usage is for the storage and retrieval of Cisco IOS and Catalyst switch configurations files.

What is Trivial File Transfer Protocol?

500

Number of Networks is 16,382 (214 – 2)

What is Class B?

500

1 byte = __ Hex characters

What is 2?

500
In CIDR, 255.255.255.240 becomes this

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