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CCNA 200-301 Network Automation &
Programmability Exam Study Guide
Questions & Answers Latest Update
2026/27
What are the six main domains of the CCNA 200-301 exam and their approximate
weightings? <<CORRECT ANSWER>> 1. Network Fundamentals (20%) 2. Network
Access
(20%) 3. IP Connectivity (25%) 4. IP Services (10%) 5. Security Fundamentals (15%) 6.
Automation and Programmability (10%)
What is the OSI model and its seven layers? <<CORRECT ANSWER>> A conceptual
framework for network communication: 7. Application 6. Presentation 5. Session 4.
Transport 3. Network 2. Data Link 1. Physical
How does the TCP/IP model compare to the OSI model? <<CORRECT ANSWER>>
TCP/IP
has four layers: Application (covers OSI 5-7), Transport (OSI 4), Internet (OSI 3),
Network Access (OSI 1-2). More practical and aligned with real protocols.
What is the difference between TCP and UDP? <<CORRECT ANSWER>> TCP:
Connection-oriented, reliable, ordered delivery, flow control (e.g., HTTP, FTP). UDP:
Connectionless, best-effort, faster, no reliability (e.g., DNS queries, streaming).
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What are collision domain and broadcast domain? <<CORRECT ANSWER>> Collision
domain: Segment where frames can collide (e.g., hub-based). Broadcast domain:
Segment where broadcasts propagate (e.g., VLAN or subnet).
What is the purpose of a MAC address? <<CORRECT ANSWER>> 48-bit hardware
address
(OUI + unique) used for Layer 2 communication on local networks.
What are the IPv4 address classes (A-E)? <<CORRECT ANSWER>> Class A: 1-126
(large
networks), B: 128-191 (medium), C: 192-223 (small), D: 224-239 (multicast), E: 240-255
(experimental).
What is subnetting and why is it used? <<CORRECT ANSWER>> Dividing a network
into
smaller subnetworks using subnet masks to improve efficiency, security, and
organization.
What is CIDR notation? <<CORRECT ANSWER>> Classless Inter-Domain Routing:
e.g., /24
means 255.255.255.0 mask, allowing variable-length subnetting.
What is VLSM? <<CORRECT ANSWER>> Variable Length Subnet Masking: Using
different
subnet mask lengths within the same network for efficient IP allocation.
What are private IPv4 address ranges? <<CORRECT ANSWER>> 10.0.0.0/8,
, 3
172.16.0.0/12, 192.168.0.0/16 - not routable on the public internet.
CCNA 200-301 Network Automation &
Programmability Exam Study Guide
Questions & Answers Latest Update
2026/27
What are the six main domains of the CCNA 200-301 exam and their approximate
weightings? <<CORRECT ANSWER>> 1. Network Fundamentals (20%) 2. Network
Access
(20%) 3. IP Connectivity (25%) 4. IP Services (10%) 5. Security Fundamentals (15%) 6.
Automation and Programmability (10%)
What is the OSI model and its seven layers? <<CORRECT ANSWER>> A conceptual
framework for network communication: 7. Application 6. Presentation 5. Session 4.
Transport 3. Network 2. Data Link 1. Physical
How does the TCP/IP model compare to the OSI model? <<CORRECT ANSWER>>
TCP/IP
has four layers: Application (covers OSI 5-7), Transport (OSI 4), Internet (OSI 3),
Network Access (OSI 1-2). More practical and aligned with real protocols.
What is the difference between TCP and UDP? <<CORRECT ANSWER>> TCP:
Connection-oriented, reliable, ordered delivery, flow control (e.g., HTTP, FTP). UDP:
Connectionless, best-effort, faster, no reliability (e.g., DNS queries, streaming).
,2
What are collision domain and broadcast domain? <<CORRECT ANSWER>> Collision
domain: Segment where frames can collide (e.g., hub-based). Broadcast domain:
Segment where broadcasts propagate (e.g., VLAN or subnet).
What is the purpose of a MAC address? <<CORRECT ANSWER>> 48-bit hardware
address
(OUI + unique) used for Layer 2 communication on local networks.
What are the IPv4 address classes (A-E)? <<CORRECT ANSWER>> Class A: 1-126
(large
networks), B: 128-191 (medium), C: 192-223 (small), D: 224-239 (multicast), E: 240-255
(experimental).
What is subnetting and why is it used? <<CORRECT ANSWER>> Dividing a network
into
smaller subnetworks using subnet masks to improve efficiency, security, and
organization.
What is CIDR notation? <<CORRECT ANSWER>> Classless Inter-Domain Routing:
e.g., /24
means 255.255.255.0 mask, allowing variable-length subnetting.
What is VLSM? <<CORRECT ANSWER>> Variable Length Subnet Masking: Using
different
subnet mask lengths within the same network for efficient IP allocation.
What are private IPv4 address ranges? <<CORRECT ANSWER>> 10.0.0.0/8,
, 3
172.16.0.0/12, 192.168.0.0/16 - not routable on the public internet.
