Cisco CCNA (200-301) actual Exam 2026/ 2027 questions and well
detailed answers
1. Which layer of the OSI model is responsible for reliable end-to-end data
delivery, flow control, and error correction?
• A) Physical Layer
• B) Data Link Layer
• C) Transport Layer
• D) Network Layer Correct Answer: C) Transport Layer Explanation: The
Transport layer (Layer 4), utilizing protocols such as TCP, handles reliable
data transfer, flow control, windowing, and error recovery between hosts.
2. What is the default administrative distance of an EIGRP internal route?
• A) 1
• B) 90
• C) 110
• D) 120 Correct Answer: B) 90 Explanation: EIGRP internal routes have a
default administrative distance of 90, making them preferred over OSPF
(110) and RIP (120).
3. Which IPv6 address type is comparable to IPv4 private addresses and is
routable only within a specific site or organization?
• A) Global Unicast Address
• B) Link-Local Address
• C) Unique Local Address
• D) Anycast Address Correct Answer: C) Unique Local Address Explanation:
Unique Local Addresses (ULAs) in IPv6 are designed for local
communications within a site or organization and are not routable on the
public internet, similar to RFC 1918 private IPv4 addresses.
4. Which cable type is traditionally used to connect two devices of the same
type, such as two switches without auto-MDIX?
,Cisco CCNA (200-301) actual Exam 2026/ 2027 questions and well
detailed answers
• A) Straight-through cable
• B) Crossover cable
• C) Rollover cable
• D) Fiber optic single-mode cable Correct Answer: B) Crossover cable
Explanation: Crossover cables cross the transmit and receive pins, allowing
direct communication between similar devices (e.g., switch-to-switch or
router-to-router), though modern hardware often uses auto-MDIX to
handle this automatically.
5. What is the bit length of an IPv4 address?
• A) 16 bits
• B) 32 bits
• C) 64 bits
• D) 128 bits Correct Answer: B) 32 bits Explanation: An IPv4 address consists
of 32 bits, typically represented as four octets separated by dots (dotted-
decimal notation).
6. What is the prefix length for a subnet mask of 255.255.255.240?
• A) /24
• B) /26
• C) /28
• D) /30 Correct Answer: C) /28 Explanation: A subnet mask of
255.255.255.240 has 28 contiguous bits set to 1 in binary
(11111111.11111111.11111111.11110000), which corresponds to a /28
prefix.
7. Which Wi-Fi standard introduced operation in the 6 GHz band in addition to
2.4 GHz and 5 GHz?
• A) 802.11n
,Cisco CCNA (200-301) actual Exam 2026/ 2027 questions and well
detailed answers
• B) 802.11ac
• C) 802.11ax (Wi-Fi 6E)
• D) 802.11g Correct Answer: C) 802.11ax (Wi-Fi 6E) Explanation: Wi-Fi 6E
extends the 802.11ax standard to operate in the newly available 6 GHz
frequency band, offering wider channels and less interference.
8. Which TCP flag is used to initiate a connection handshake between two
devices?
• A) ACK
• B) FIN
• C) SYN
• D) RST Correct Answer: C) SYN Explanation: The SYN (Synchronize) flag is
sent by the client to request a synchronization sequence number and
initiate a TCP three-way handshake.
9. What port number does HTTPS use by default?
• A) TCP 80
• B) TCP 443
• C) UDP 53
• D) TCP 22 Correct Answer: B) TCP 443 Explanation: HTTPS (Secure HTTP)
operates over TCP port 443 by default to provide encrypted web
communications.
10.Which sublayer of the Data Link layer deals with media access control and
physical addressing?
• A) LLC (Logical Link Control)
• B) MAC (Medium Access Control)
• C) PHY (Physical Layer)
, Cisco CCNA (200-301) actual Exam 2026/ 2027 questions and well
detailed answers
• D) ARC Correct Answer: B) MAC (Medium Access Control) Explanation: The
MAC sublayer controls how devices gain access to the medium and handles
physical hardware addressing, while the LLC sublayer manages network
protocols above it.
11.Which protocol is used to dynamically discover the MAC address associated
with a known IPv4 address?
• A) RARP
• B) ARP
• C) DHCP
• D) DNS Correct Answer: B) ARP Explanation: Address Resolution Protocol
(ARP) resolves a known IPv4 address into its corresponding Layer 2 MAC
address on a local area network.
12.Which IEEE standard defines VLAN trunking protocols on Ethernet switches?
• A) 802.3
• B) 802.11
• C) 802.1Q
• D) 802.1D Correct Answer: C) 802.1Q Explanation: The IEEE 802.1Q
standard defines the mechanism of VLAN tagging, allowing multiple VLANs
to traverse a single physical trunk link.
13.What is the default Spanning Tree Protocol (STP) mode on modern Cisco
Catalyst switches?
• A) IEEE 802.1D (Classic STP)
• B) PVST+
• C) Rapid PVST+
• D) MSTP Correct Answer: C) Rapid PVST+ (Rapid Per-VLAN Spanning Tree
Plus) Explanation: Modern Cisco Catalyst switches use Rapid PVST+ by
detailed answers
1. Which layer of the OSI model is responsible for reliable end-to-end data
delivery, flow control, and error correction?
• A) Physical Layer
• B) Data Link Layer
• C) Transport Layer
• D) Network Layer Correct Answer: C) Transport Layer Explanation: The
Transport layer (Layer 4), utilizing protocols such as TCP, handles reliable
data transfer, flow control, windowing, and error recovery between hosts.
2. What is the default administrative distance of an EIGRP internal route?
• A) 1
• B) 90
• C) 110
• D) 120 Correct Answer: B) 90 Explanation: EIGRP internal routes have a
default administrative distance of 90, making them preferred over OSPF
(110) and RIP (120).
3. Which IPv6 address type is comparable to IPv4 private addresses and is
routable only within a specific site or organization?
• A) Global Unicast Address
• B) Link-Local Address
• C) Unique Local Address
• D) Anycast Address Correct Answer: C) Unique Local Address Explanation:
Unique Local Addresses (ULAs) in IPv6 are designed for local
communications within a site or organization and are not routable on the
public internet, similar to RFC 1918 private IPv4 addresses.
4. Which cable type is traditionally used to connect two devices of the same
type, such as two switches without auto-MDIX?
,Cisco CCNA (200-301) actual Exam 2026/ 2027 questions and well
detailed answers
• A) Straight-through cable
• B) Crossover cable
• C) Rollover cable
• D) Fiber optic single-mode cable Correct Answer: B) Crossover cable
Explanation: Crossover cables cross the transmit and receive pins, allowing
direct communication between similar devices (e.g., switch-to-switch or
router-to-router), though modern hardware often uses auto-MDIX to
handle this automatically.
5. What is the bit length of an IPv4 address?
• A) 16 bits
• B) 32 bits
• C) 64 bits
• D) 128 bits Correct Answer: B) 32 bits Explanation: An IPv4 address consists
of 32 bits, typically represented as four octets separated by dots (dotted-
decimal notation).
6. What is the prefix length for a subnet mask of 255.255.255.240?
• A) /24
• B) /26
• C) /28
• D) /30 Correct Answer: C) /28 Explanation: A subnet mask of
255.255.255.240 has 28 contiguous bits set to 1 in binary
(11111111.11111111.11111111.11110000), which corresponds to a /28
prefix.
7. Which Wi-Fi standard introduced operation in the 6 GHz band in addition to
2.4 GHz and 5 GHz?
• A) 802.11n
,Cisco CCNA (200-301) actual Exam 2026/ 2027 questions and well
detailed answers
• B) 802.11ac
• C) 802.11ax (Wi-Fi 6E)
• D) 802.11g Correct Answer: C) 802.11ax (Wi-Fi 6E) Explanation: Wi-Fi 6E
extends the 802.11ax standard to operate in the newly available 6 GHz
frequency band, offering wider channels and less interference.
8. Which TCP flag is used to initiate a connection handshake between two
devices?
• A) ACK
• B) FIN
• C) SYN
• D) RST Correct Answer: C) SYN Explanation: The SYN (Synchronize) flag is
sent by the client to request a synchronization sequence number and
initiate a TCP three-way handshake.
9. What port number does HTTPS use by default?
• A) TCP 80
• B) TCP 443
• C) UDP 53
• D) TCP 22 Correct Answer: B) TCP 443 Explanation: HTTPS (Secure HTTP)
operates over TCP port 443 by default to provide encrypted web
communications.
10.Which sublayer of the Data Link layer deals with media access control and
physical addressing?
• A) LLC (Logical Link Control)
• B) MAC (Medium Access Control)
• C) PHY (Physical Layer)
, Cisco CCNA (200-301) actual Exam 2026/ 2027 questions and well
detailed answers
• D) ARC Correct Answer: B) MAC (Medium Access Control) Explanation: The
MAC sublayer controls how devices gain access to the medium and handles
physical hardware addressing, while the LLC sublayer manages network
protocols above it.
11.Which protocol is used to dynamically discover the MAC address associated
with a known IPv4 address?
• A) RARP
• B) ARP
• C) DHCP
• D) DNS Correct Answer: B) ARP Explanation: Address Resolution Protocol
(ARP) resolves a known IPv4 address into its corresponding Layer 2 MAC
address on a local area network.
12.Which IEEE standard defines VLAN trunking protocols on Ethernet switches?
• A) 802.3
• B) 802.11
• C) 802.1Q
• D) 802.1D Correct Answer: C) 802.1Q Explanation: The IEEE 802.1Q
standard defines the mechanism of VLAN tagging, allowing multiple VLANs
to traverse a single physical trunk link.
13.What is the default Spanning Tree Protocol (STP) mode on modern Cisco
Catalyst switches?
• A) IEEE 802.1D (Classic STP)
• B) PVST+
• C) Rapid PVST+
• D) MSTP Correct Answer: C) Rapid PVST+ (Rapid Per-VLAN Spanning Tree
Plus) Explanation: Modern Cisco Catalyst switches use Rapid PVST+ by
