Flashcards for MAC, IPv4, IPv6, and Port Security

MAC Address - Density

48 bits.

MAC Address - Numbering System

Hexadecimal (12 characters

MAC Address - Location

Burned into the hardware (physical address).

MAC Address - Type

Physical address.

MAC Address - Device

Used by switches.

MAC Address - Example

00-50-56-C0-00-01.

IPv4 Address - Density

32 bits.

IPv4 Address - Numbering System

Dotted decimal notation (4 numbers separated by dots).

IPv4 Address - Location

Assigned by a network administrator or DHCP.

IPv4 Address - Type

Logical address.

IPv4 Address - Device

Used by routers.

IPv4 Address - Example

192.168.1.2.

IPv6 Address - Density

128 bits.

IPv6 Address - Numbering System

Hexadecimal (32 characters

IPv6 Address - Location

Assigned by a network administrator or DHCP.

IPv6 Address - Type

Logical address.

IPv6 Address - Device

Used by routers.

IPv6 Address - Example

fe80::3402:5de3:4682:43e.

IPv6 Compression Rules

Strip leading zeroes

Port Security - Function

Uses ACL to allow only specific MAC addresses on a switch port.

Port Security - Purpose

Ensures only authorized devices can connect to the network via that port.

Layer 2 Frame - Fields

Preamble

Layer 2 Frame - MTU (Minimum Size)

64 bytes.

Layer 2 Frame - MTU (Maximum Size)

1500 bytes.

802.1x - Process

Supplicant requests access. Authenticator forwards request to Authentication Server. If verified

802.1x - Protocol

EAPoL (Extensible Authentication Protocol over LAN).

802.1x - Purpose

Provides secure network access control based on port authentication.