How many VLAN tags may contain each physical port on an Ethernet 1000 line card?

The correct answer is B. up to 1024. Option B (up to 1024) is correct because the Ethernet 1000 line card imposes a hardware limit of 1024 VLAN tags per physical port, which aligns with a standard power-of-two boundary (2¹⁰) commonly used in networking hardware design. Why the distractors are wrong: A (124) is far…

Cisco Mobile Packet Core Architecture

Question

Options

Aup to 124
Bup to 1024
Cup to 1820
Dup to 2000

How the community answered

(34 responses)

A
6% (2)
B
88% (30)
C
3% (1)
D
3% (1)

Explanation

Option B (up to 1024) is correct because the Ethernet 1000 line card imposes a hardware limit of 1024 VLAN tags per physical port, which aligns with a standard power-of-two boundary (2¹⁰) commonly used in networking hardware design.

Why the distractors are wrong:

A (124) is far too low and does not correspond to any standard per-port VLAN limit on this line card.
C (1820) is not a power-of-two value and exceeds the actual per-port hardware constraint.
D (2000) also exceeds the per-port limit and may be confused with the total usable 802.1Q VLAN range (1–4094), which is a different concept entirely.

Memory tip: Think "1K per port" - 1024 is simply 1K (2¹⁰), making it easy to recall as a clean binary hardware boundary. Don't confuse the per-port VLAN tag limit with the total 802.1Q VLAN ID space (4096 IDs), which is a much larger number.

Topics

#VLAN Tagging#Ethernet Line Card#Port Configuration#Hardware Specifications

Community Discussion

No community discussion yet for this question.

Full 500-215 Practice