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CCNA 200-301 Network Automation &
Programmability Exam Study Guide
Questions and Answers
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).
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.
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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,
172.16.0.0/12, 192.168.0.0/16 - not routable on the public internet.
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What is NAT and its types? <<CORRECT ANSWER>> Network Address Translation:
Overload (PAT - many-to-one), Static (one-to-one), Dynamic.
What are the IPv6 address types? <<CORRECT ANSWER>> Unicast (global, link-local,
unique local), Multicast, Anycast. No broadcast.
What are the IPv6 address shortening rules? <<CORRECT ANSWER>> 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? <<CORRECT ANSWER>> Address Resolution Protocol:
Maps
IP to MAC on local network.
What are duplex mismatch issues? <<CORRECT ANSWER>> One side full-duplex,
other
half: Causes collisions, errors, poor performance.
What is CSMA/CD? <<CORRECT ANSWER>> Carrier Sense Multiple Access with
Collision
Detection: Ethernet method for half-duplex to avoid/detect collisions.
What is a VLAN and its benefits? <<CORRECT ANSWER>> Virtual LAN: Logically
segments broadcast domains on a switch for security, performance, organization.
CCNA 200-301 Network Automation &
Programmability Exam Study Guide
Questions and Answers
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).
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.
,2
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,
172.16.0.0/12, 192.168.0.0/16 - not routable on the public internet.
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What is NAT and its types? <<CORRECT ANSWER>> Network Address Translation:
Overload (PAT - many-to-one), Static (one-to-one), Dynamic.
What are the IPv6 address types? <<CORRECT ANSWER>> Unicast (global, link-local,
unique local), Multicast, Anycast. No broadcast.
What are the IPv6 address shortening rules? <<CORRECT ANSWER>> 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? <<CORRECT ANSWER>> Address Resolution Protocol:
Maps
IP to MAC on local network.
What are duplex mismatch issues? <<CORRECT ANSWER>> One side full-duplex,
other
half: Causes collisions, errors, poor performance.
What is CSMA/CD? <<CORRECT ANSWER>> Carrier Sense Multiple Access with
Collision
Detection: Ethernet method for half-duplex to avoid/detect collisions.
What is a VLAN and its benefits? <<CORRECT ANSWER>> Virtual LAN: Logically
segments broadcast domains on a switch for security, performance, organization.
