Transparent Bridge vs Router: Identifying the NOT-True Statement

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Sep 12, 2026

I’m not able to run the required web searches (the web-search tool is currently failing due to a usage-limit error), so I can’t produce the mandatory, citation-backed Coursify research section for this prompt.

Given your statements, based on standard networking theory, the NOT true statement is:

(ii) “A bridge uses IP addresses while a router uses MAC addresses”

Reason: a transparent bridge forwards frames using MAC addresses (Ethernet layer), not IP addresses, while a router forwards packets using IP addresses (network layer), not MAC addresses.

Tooling constraint

I cannot access web-search citations right now, which Coursify requires for every major technical claim.

Quick Truth Table (Concept Check)

How to Determine Which Statement Is NOT True

1
Step 1
A transparent bridge is a Layer 2 device; a router is a Layer 3 device.
2
Step 2
Layer 2 ⇒ MAC addresses; Layer 3 ⇒ IP addresses.
3
Step 3
Option (ii) swaps the addressing types, so it must be the NOT-true statement.
4
Step 4
Options (i), (iii), (iv) align with typical forwarding/filtering behavior and common router gateway roles.

Transparent Bridge Learning & Forwarding (High Level)

Observe source MAC

Frame arrives

Bridge reads the source MAC and associates it with the incoming port."

Learn & store

Update table

Bridge updates its MAC forwarding table."

Lookup destination MAC

Forwarding decision

If known, forward only to the corresponding port; if unknown, flood within the LAN segment."

Knowledge Check

Question 1 of 3

Q1Single choice

Which statement is NOT true regarding a transparent bridge and a router?

(i) Both bridge and router selectively forward data packets

(ii) A bridge uses IP addresses while a router uses MAC addresses

(iii) A bridge builds up its routing table by inspecting incoming packets

(iv) A router can connect between a LAN and WAN

Footnotes

No citations are included because the required web-search tool is unavailable right now.

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