CompTIA·NETPLUS · CompTIA Network+·UnitNETPLUS · Unit 01Access: Premium
Network+ (N10-009)
Prepare for Network+ (N10-009) with CompTIA practice questions covering 39 topics. Part of CompTIA Network+ — build your knowledge and track your progress with CompTIA Prep.
What’s in it.
39 topics- Topic 01
OSI Model and Encapsulation
54 questions - Topic 02
Network Protocols and Port Numbers
100 questions - Topic 03
IP Addressing and Subnetting
147 questions - Topic 04
Routing Concepts
57 questions - Topic 05
Switching Concepts
60 questions - Topic 06
Wireless Standards and Technologies
72 questions - Topic 07
Network Topologies and Architecture
58 questions - Topic 08
Cloud and Virtual Networking Concepts
72 questions - Topic 09
WAN Technologies
74 questions - Topic 10
Routing Protocols Configuration
57 questions - Topic 11
Ethernet Switching Implementation
111 questions - Topic 12
Wireless Network Installation
79 questions - Topic 13
Physical Network Installation
62 questions - Topic 14
Network Appliances
99 questions - Topic 15
Unified Communication Technologies
83 questions - Topic 16
Virtual Network Configuration
69 questions - Topic 17
Network Monitoring and Analysis
54 questions - Topic 18
Network Documentation and Diagrams
54 questions - Topic 19
Network Management Protocols
54 questions - Topic 20
High Availability and Disaster Recovery
125 questions - Topic 21
DNS Configuration and Troubleshooting
120 questions - Topic 22
DHCP Configuration and Troubleshooting
116 questions - Topic 23
Network Segmentation
69 questions - Topic 24
Network Security Concepts
69 questions - Topic 25
Firewall and ACL Implementation
121 questions - Topic 26
Network Access Control
99 questions - Topic 27
Common Attacks and Threats
139 questions - Topic 28
Wireless Security Implementation
69 questions - Topic 29
Physical Security Controls
62 questions - Topic 30
Cryptography and PKI
131 questions - Topic 31
Vulnerability Scanning and Penetration Testing
90 questions - Topic 32
Troubleshooting Methodology
65 questions - Topic 33
Troubleshooting Physical Layer Issues
80 questions - Topic 34
Troubleshooting Switching Issues
67 questions - Topic 35
Troubleshooting Routing Issues
72 questions - Topic 36
Troubleshooting Wireless Issues
66 questions - Topic 37
Troubleshooting IP Connectivity
69 questions - Topic 38
Troubleshooting DNS and DHCP
96 questions - Topic 39
Troubleshooting Security Issues
73 questions
Sample questions
3 of manyA few questions from this unit, with the answer and a full explanation. The complete bank is available when you start practising.
Which protocols commonly use cryptography for network security, and which encryption standard does WPA2 use for wireless traffic?
- HTTPS, Telnet, FTP, and HTTP all use cryptography; WPA2 uses ChaCha20-Poly1305 for wireless encryption
- HTTPS uses symmetric AES only; IPsec uses asymmetric RSA only; WPA2 uses DES in ECB mode
- HTTPS (TLS), SSH, IPsec, and WPA2/WPA3 all use cryptography; WPA2 uses AES in CCMP mode (Counter Mode with CBC-MAC Protocol) for wireless traffic encryptionCorrect answer
- IPsec uses only the AH (Authentication Header) protocol which provides encryption; WPA2 uses TKIP with AES for wireless encryption
ExplanationHTTPS wraps HTTP in TLS, providing encrypted web communication. SSH provides an encrypted channel for remote administration. IPsec (using IKE, AH, and ESP) secures IP-layer communication for VPNs. WPA2 (IEEE 802.11i) replaced the broken WEP and introduced CCMP (Counter Mode with CBC-MAC Protocol) using AES as the underlying cipher for wireless data confidentiality and integrity. WPA3 introduces SAE (Simultaneous Authentication of Equals) for handshake security and can also use Galois/Counter Mode (GCMP). Key takeaway: WPA2 uses AES-CCMP for wireless encryption — replacing the broken RC4/TKIP used in WEP and early WPA.
What are the TIA/EIA T568A and T568B wiring standards?
- TIA/EIA standards for the physical dimensions and spacing of RJ-45 ports on patch panels and keystone jacks
- Pin-out standards for RJ-45 terminations that define the colour-code order of the eight wires in a twisted-pair Ethernet cable, with T568B being most common in commercial North American installationsCorrect answer
- Fibre optic cabling standards that define acceptable light loss levels for multimode and single-mode cable runs
- IEEE standards that define the maximum cable length and signal speed for Cat 6 and Cat 6a
ExplanationT568A and T568B are two wiring pin-out standards defined in ANSI/TIA-568 that specify the colour-code order for terminating the eight wires of a twisted-pair cable at an RJ-45 connector or keystone jack. The difference between the two standards is that pairs 2 and 3 are swapped — T568B is the most common in commercial and residential installations in North America, while T568A is specified for US government installations. When both ends of a patch cable use the same standard, it is a straight-through cable. Key takeaway: T568A and T568B are pin-out colour-code standards for RJ-45 terminations; T568B is the North American commercial standard.
After a major network outage lasting 6 hours, a post-incident review finds three contributing factors: (1) a routing change made 3 weeks earlier was never documented, (2) the on-call engineer used the outdated diagram to diagnose the issue and made two incorrect changes based on it, and (3) the correct engineer who made the original change was unavailable. Which root cause analysis conclusion is MOST accurate?
- The primary root cause is hardware failure; the routing change was irrelevant because the outage was caused by a switch fault, not the configuration drift.
- The primary root cause is the routing change itself; routing changes should be prohibited without dual approval to prevent undocumented modifications.
- The primary root cause is the availability of the original engineer; a staffing policy requiring two engineers to approve changes would prevent future incidents.
- The primary root cause is a process failure: the change management policy did not enforce documentation updates, so the undocumented routing change became a latent hazard that magnified the outage duration when the knowledgeable engineer was unavailable.Correct answer
ExplanationThis scenario illustrates documentation process failure as a force multiplier for outages. The original routing change was technically successful, but the failure to update documentation created a latent hazard. When an unrelated incident occurred, the on-call engineer had no choice but to use the inaccurate diagram, leading to compounding errors. The root cause is not skill, staffing, or the original change itself — it is the process failure that allowed documentation to drift from reality. This is why change management frameworks mandate documentation updates as part of the change closure process. Key takeaway: undocumented changes create latent hazards that become critical failures during subsequent incidents.