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CompTIA Network+ 1.1 Cisco CCNA 1.13 Cisco CCST Networking 4.5
TechKnowSurge Catalog Interactives Read the MAC Address
InteractiveNetworkFree

Read the MAC Address

Count the digits, spot the bad character, rewrite the separators. Fill each blank.

⚑ Complete this interactive to capture a CTF flag worth 5 points.

About this interactive

From the lesson: a MAC address is 48 bits, burned into the network card by the card's maker. Nobody can read 48 ones and zeros, so it is written in hexadecimal. - Each hex digit stands for 4 bits, so 48 bits are **12 hex digits**, and each pair of digits is 8 bits, one byte: **6 bytes**. - Hex digits are **0 to 9 and A to F**. Any other letter means it is not a MAC address. - The pairs are split by **colons or dashes** (Windows uses dashes). The separator, and capital or lower-case letters, do not change the address: they are only there so people can read it. - **FF:FF:FF:FF:FF:FF**, all 48 bits set to 1, is the broadcast address: every device that receives a frame sent to it processes it.

What you'll learn

Aligned to

CompTIA Network+
1.1 Explain concepts related to the Open Systems Interconnection (OSI) reference model.
Cisco CCNA
1.13 Describe switching concepts
Cisco CCST Networking
4.5 Explain basic switching concepts

Key terms

MAC Address
A 48-bit hardware address assigned to a network interface and written as six hexadecimal octets, such as 00:1A:2B:3C:4D:5E. It identifies a device uniquely on a local network segment, and switches forward frames by looking it up in their MAC address table.
Hexadecimal
Hex
A base-16 number system using digits 0–9 and letters A–F; each hex digit maps to exactly 4 bits, making it a compact shorthand for representing binary data.
Burned-In Address
BIA
A MAC address permanently assigned to a network interface card by its manufacturer at the time of production.
Broadcast
A transmission type in which one device sends a single packet that is delivered to every other device on the local network segment simultaneously. Broadcast traffic is contained within a broadcast domain and does not cross router boundaries.

Topics

Mac Address Hexadecimal Burned In Address Interactive Fill In

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