200-301 — Most Debated Topics

Community-voted ranking of 41 topics, sorted by disagreement level. Higher dispute = more test-takers disagree on the answer.

#1
Rapid PVST+ Port State That Neither Receives BPDUs nor Learns MAC
S-Grade Dispute: 42% 12 comments
#2
Identifying an Object in a JSON Schema
A-Grade Dispute: 33% 4 comments
#3
Interface Instability Caused by a Half-Duplex / Duplex Mismatch
A-Grade Dispute: 33% 4 comments
#4
Computing the EUI-64 Interface ID for a Given MAC Address
S-Grade Dispute: 29% 11 comments
#5
Electing the Root Bridge in PVST+ by Priority and MAC
S-Grade Dispute: 29% 7 comments
#6
How a Switch Handles an ARP Request for an Unknown Destination
S-Grade Dispute: 25% 7 comments
#7
Diagnosing Router Interface Output Drops as Oversubscription
A-Grade Dispute: 25% 4 comments
#8
Switch Frame Forwarding: Flooding Unknown Unicast Destinations
S-Grade Dispute: 22% 8 comments
#9
Configuring a WLAN for WPA2 PSK with MAC-Filter Restrictions
S-Grade Dispute: 20% 5 comments
#10
How MAC Address Learning Functions on a Switch
A-Grade Dispute: 17% 4 comments
#11
Switch Action on a Frame from an Unknown Source MAC
A-Grade Dispute: 15% 4 comments
#12
How MAC Address Learning Works on a Switch
S-Grade Dispute: 12% 6 comments
#13
Computing the IPv6 EUI-64 Interface ID from a Given MAC
S-Grade Dispute: 11% 5 comments
#14
Restricting a WLAN to DHCP and DNS with a Web Policy
A-Grade Dispute: 11% 3 comments
#15
Managing an AP with No IP Using the Console Port
A-Grade Dispute: 0% 3 comments
#16
IPv6 Multicast Versus Anycast Address Behavior
A-Grade Dispute: 0% 4 comments
#17
Identifying True Multifactor Authentication Parameters
A-Grade Dispute: 0% 3 comments
#18
Setting the Default Gateway in a DHCP Pool
A-Grade Dispute: 0% 5 comments
#19
How a Switch Performs Frame Switching
A-Grade Dispute: 0% 5 comments
#20
Router Behavior When Resolving a URL on the CLI
A-Grade Dispute: 0% 3 comments
#21
How a Switch Performs Frame Switching
A-Grade Dispute: 0% 6 comments
#22
Building the EUI-64 Interface Identifier for Router R2
A-Grade Dispute: 0% 9 comments
#23
Layer 2 Switch Characteristic: VLAN Segmentation via Tagging
A-Grade Dispute: 0% 3 comments
#24
How MAC Learning Adds Source Addresses to the CAM Table
A-Grade Dispute: 0% 9 comments
#25
Disabling an EtherChannel with port-channel min-links
A-Grade Dispute: 0% 9 comments
#26
Two Reasons to Implement DHCP in a Network
A-Grade Dispute: 0% 11 comments
#27
EUI-64 Interface ID Calculation for Router R2 (Segment 7)
A-Grade Dispute: 0% 8 comments
#28
Forming the EUI-64 Suffix for Router R1 (Segment 8)
A-Grade Dispute: 0% 6 comments
#29
Root Bridge Election on a Priority Tie: Lowest MAC Wins (SW2)
A-Grade Dispute: 0% 6 comments
#30
Root Bridge Election by Lowest MAC When Priorities Are Equal (SW4)
A-Grade Dispute: 0% 4 comments
#31
Routes Learned from Neighbors (Not Directly Connected) on R2
A-Grade Dispute: 0% 4 comments
#32
RFC 4627 Default Encoding for JSON Text Is UTF-8
A-Grade Dispute: 0% 4 comments
#33
Host Misconfigured with the Wrong Default Gateway
A-Grade Dispute: 0% 3 comments
#34
Electing the Root Bridge by Lowest Priority Then MAC
A-Grade Dispute: 0% 7 comments
#35
Using Digital Certificates for Enterprise Device Authentication
A-Grade Dispute: 0% 4 comments
#36
Biometric Authentication Uses a Physical Attribute
A-Grade Dispute: 0% 3 comments
#37
Electing the Root Bridge by Lowest Priority (SW2)
A-Grade Dispute: 0% 5 comments
#38
What an Iterative DNS Query Does
A-Grade Dispute: 0% 6 comments
#39
Control-Plane Centralization: Controller-Based vs Traditional Networks
A-Grade Dispute: 0% 3 comments
#40
IPsec Tunnel Mode Encrypts the Entire Original Datagram
A-Grade Dispute: 0% 8 comments
#41
Equal-AD Routes Cause R1 to Load-Balance to 172.16.1.4/30
A-Grade Dispute: 0% 3 comments

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