Front
IPv4 Multicast Range
Back
224.0.0.0 to 239.255.255.255 (Class D)
Used for one-to-many communication (e.g., routing protocol updates).
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CCNA Networking - 50 Essential Topics
Master CCNA networking with 50 flashcards covering IP addressing, routing, switching, security, and automation.
AnyFlashcards50 cards
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Front
OSI Model: Layer 1
Back
Physical Layer
Transmits raw bit streams over physical medium (cables, hubs, repeaters).
Front
OSI Model: Layer 2
Back
Data Link Layer
Handles MAC addressing and framing (switches, bridges).
show mac address-tableFront
OSI Model: Layer 3
Back
Network Layer
Responsible for logical addressing and routing (IP addresses, routers).
show ip routeFront
OSI Model: Layer 4
Back
Transport Layer
Manages end-to-end communication and error recovery (TCP, UDP).
Front
TCP vs. UDP
Back
Connection-oriented vs. Connectionless
TCP ensures delivery (HTTP/FTP); UDP is faster but unreliable (VoIP/DNS).
Front
Star Topology
Back
Centralized Hub/Switch Connection
All nodes connect to a central device; easy to troubleshoot but central failure kills network.
Front
Single-mode vs. Multi-mode Fiber
Back
Long distance vs. Short distance
Single-mode uses lasers for miles; Multi-mode uses LEDs for buildings/campuses.
Front
Straight-through vs. Crossover Cable
Back
Different vs. Same device types
Straight-through: Switch to Router; Crossover: Switch to Switch (obsolete via Auto-MDIX).
Front
Collision Domain vs. Broadcast Domain
Back
Hub port vs. Router port
Each switch port is a collision domain; each router port is a broadcast domain.
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