About This Flashcard Deck
This flashcard deck contains 10 cards covering key Switching & VLAN concepts for the CCNA exam. Test your Layer 2 switching and VLAN knowledge for the CCNA exam. Use active recall by attempting to answer each question before revealing the answer.
Question
What is the default native VLAN on a trunk?
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Answer
VLAN 1. Frames on the native VLAN are sent untagged on an 802.1Q trunk.
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All Switching & VLAN Flashcards
Q: What is the default native VLAN on a trunk?
A: VLAN 1. Frames on the native VLAN are sent untagged on an 802.1Q trunk.
Q: What does STP prevent?
A: Layer 2 loops (broadcast storms, MAC table instability, duplicate frames).
Q: How is the STP root bridge elected?
A: Lowest bridge ID wins. Bridge ID = priority (default 32768) + VLAN ID + MAC address.
Q: What are the three STP port roles?
A: Root Port (best path to root), Designated Port (best port on a segment), and Blocked Port (non-designated, prevents loops).
Q: What is the difference between LACP and PAgP?
A: LACP is IEEE 802.3ad (open standard). PAgP is Cisco proprietary. Both negotiate EtherChannel.
Q: What is a trunk port?
A: A switch port that carries traffic for multiple VLANs using 802.1Q tagging.
Q: What is RSTP and how is it different from STP?
A: Rapid Spanning Tree Protocol (802.1w) converges faster than STP (802.1D): seconds vs ~50 seconds.
Q: What command disables DTP on a switch port?
A: switchport nonegotiate
Q: What is router-on-a-stick?
A: Using sub-interfaces on a single router interface, each assigned to a different VLAN, to perform inter-VLAN routing.
Q: What is an SVI?
A: Switch Virtual Interface — a Layer 3 interface on a switch (interface vlan <id>) used for inter-VLAN routing and management.
Cisco Flashcard Study Strategy
Cisco exams heavily test protocol operations and configuration details. Use these flashcards to drill port numbers, protocol behaviours, and administrative distances. Pair flashcard sessions with Packet Tracer labs — when you encounter a card about OSPF neighbour states, open a lab and verify each state transition on a live topology. This combination of memorisation and practice builds the deep understanding Cisco exams demand.