CCNA 200-301 Network Automation &
Programmability Exam | Study Guide &
Practice|| LATEST UPDATE 2026/27
What are the six main domains of the CCNA 200-301 exam and their approximate
weightings? -CORRECTANSWER 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? -CORRECTANSWER 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? -CORRECTANSWER 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? -CORRECTANSWER TCP:
Connection-oriented, reliable, ordered delivery, flow control (e.g., HTTP, FTP). UDP:
Connectionless, best-effort, faster, no reliability (e.g., DNS queries, streaming).
,What are collision domain and broadcast domain? -CORRECTANSWER 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? -CORRECTANSWER 48-bit hardware address
(OUI + unique) used for Layer 2 communication on local networks.
What are the IPv4 address classes (A-E)? -CORRECTANSWER 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? -CORRECTANSWER Dividing a network into
smaller subnetworks using subnet masks to improve efficiency, security, and
organization.
What is CIDR notation? -CORRECTANSWER Classless Inter-Domain Routing: e.g., /24
means 255.255.255.0 mask, allowing variable-length subnetting.
What is VLSM? -CORRECTANSWER Variable Length Subnet Masking: Using different
subnet mask lengths within the same network for efficient IP allocation.
What are private IPv4 address ranges? -CORRECTANSWER 10.0.0.0/8,
172.16.0.0/12, 192.168.0.0/16 - not routable on the public internet.
, What is NAT and its types? -CORRECTANSWER Network Address Translation:
Overload (PAT - many-to-one), Static (one-to-one), Dynamic.
What are the IPv6 address types? -CORRECTANSWER Unicast (global, link-local,
unique local), Multicast, Anycast. No broadcast.
What are the IPv6 address shortening rules? -CORRECTANSWER Omit leading zeros,
replace consecutive zeros with :: (once), e.g.,
2001:0db8:0000:0000:0000:0000:1234:5678 → 2001:db8::1234:5678.
What is the purpose of ARP? -CORRECTANSWER Address Resolution Protocol: Maps
IP to MAC on local network.
What are duplex mismatch issues? -CORRECTANSWER One side full-duplex, other
half: Causes collisions, errors, poor performance.
What is CSMA/CD? -CORRECTANSWER Carrier Sense Multiple Access with Collision
Detection: Ethernet method for half-duplex to avoid/detect collisions.
What is a VLAN and its benefits? -CORRECTANSWER Virtual LAN: Logically
segments broadcast domains on a switch for security, performance, organization.
Programmability Exam | Study Guide &
Practice|| LATEST UPDATE 2026/27
What are the six main domains of the CCNA 200-301 exam and their approximate
weightings? -CORRECTANSWER 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? -CORRECTANSWER 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? -CORRECTANSWER 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? -CORRECTANSWER TCP:
Connection-oriented, reliable, ordered delivery, flow control (e.g., HTTP, FTP). UDP:
Connectionless, best-effort, faster, no reliability (e.g., DNS queries, streaming).
,What are collision domain and broadcast domain? -CORRECTANSWER 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? -CORRECTANSWER 48-bit hardware address
(OUI + unique) used for Layer 2 communication on local networks.
What are the IPv4 address classes (A-E)? -CORRECTANSWER 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? -CORRECTANSWER Dividing a network into
smaller subnetworks using subnet masks to improve efficiency, security, and
organization.
What is CIDR notation? -CORRECTANSWER Classless Inter-Domain Routing: e.g., /24
means 255.255.255.0 mask, allowing variable-length subnetting.
What is VLSM? -CORRECTANSWER Variable Length Subnet Masking: Using different
subnet mask lengths within the same network for efficient IP allocation.
What are private IPv4 address ranges? -CORRECTANSWER 10.0.0.0/8,
172.16.0.0/12, 192.168.0.0/16 - not routable on the public internet.
, What is NAT and its types? -CORRECTANSWER Network Address Translation:
Overload (PAT - many-to-one), Static (one-to-one), Dynamic.
What are the IPv6 address types? -CORRECTANSWER Unicast (global, link-local,
unique local), Multicast, Anycast. No broadcast.
What are the IPv6 address shortening rules? -CORRECTANSWER Omit leading zeros,
replace consecutive zeros with :: (once), e.g.,
2001:0db8:0000:0000:0000:0000:1234:5678 → 2001:db8::1234:5678.
What is the purpose of ARP? -CORRECTANSWER Address Resolution Protocol: Maps
IP to MAC on local network.
What are duplex mismatch issues? -CORRECTANSWER One side full-duplex, other
half: Causes collisions, errors, poor performance.
What is CSMA/CD? -CORRECTANSWER Carrier Sense Multiple Access with Collision
Detection: Ethernet method for half-duplex to avoid/detect collisions.
What is a VLAN and its benefits? -CORRECTANSWER Virtual LAN: Logically
segments broadcast domains on a switch for security, performance, organization.
