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Wi-Fi, Cabling, Connectors, and Transceivers Quick Table

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CompTIA Network+ N10-009

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1 Introduction & Exam Overview

Current Exam Facts and Applied Networking Judgment Official Domain Weights and an 8-12 Week Study Plan How to Use Labs, Practice, and PBQ Workflow Missed-Question Notebook and Final Readiness Metrics

2 Domain 1: Networking Concepts (23%)

OSI and TCP/IP Models with Device and Protocol Mapping Networking Appliances and Where They Operate Ports and Protocol Decision Table Traffic Types and Encapsulation Flow

3 Domain 1: Media, Connectors, Transceivers, and Network Architectures

Copper, Fiber, Coax, and DAC Media Connector and Transceiver Selection Network Topologies and Design Patterns Cloud and Virtual Networking Concepts

4 Domain 1: IP Addressing and Subnetting Mastery

IPv4 Classes, Private/Public, APIPA, and Loopback CIDR, VLSM, and Subnet Math IPv6 Address Types and Notation Routing Basics and Longest Prefix Match

5 Domain 2: Network Implementation - Routing

Static vs Dynamic Routing and Route Selection OSPF, EIGRP, and BGP Basics at Network+ Depth NAT/PAT, VIP/FHRP, and Subinterfaces Routing PBQs and Troubleshooting Route Table Clues

6 Domain 2: Network Implementation - Switching

VLANs, Access Ports, Trunks, and Native VLAN STP/RSTP Loop Prevention and Bridge Roles Port Aggregation/LACP, MTU, Jumbo Frames, and Interface Settings Switch Implementation PBQs and Common Misconfigurations

7 Domain 2: Network Implementation - Wireless and Physical Implementation

Wi-Fi Standards, Bands, and Channels SSID Security, Guest Networks, and Authentication Antennas, Coverage, Roaming, Interference, and Site Surveys Physical Installation Implications

8 Domain 2: Network Implementation - Services Implementation

DNS Record Types and Troubleshooting Cues DHCP, DHCPv6, SLAAC, Scopes, Leases, and Relay NTP, PTP, NTS, and Time-Sensitive Networking Service Implementation PBQs: DNS, DHCP, VLANs, and Firewall Direction

9 Domain 3 Part A: Network Operations Documentation and Governance

Physical, Logical, Rack, Cable, Wireless Diagrams, and IPAM Asset Inventory, Baselines, SLAs, SOPs, and Runbooks Change Management and Request Tracking Lifecycle, EOL, EOS, Decommissioning, and Configuration Management

10 Domain 3 Part B: Monitoring, Remote Access, and Resilience

SNMP, Flow, Syslog, Packet Capture, Log Aggregation, APIs, and Port Mirroring Baselines and Performance Metrics Remote Access, Management Paths, and Secure Admin Habits DR and HA Concepts: RPO, RTO, MTTR, MTBF, Sites, Failover, and Testing

11 Domain 4: Logical Security and Secure Access (14%)

Encryption in Transit, Encryption at Rest, PKI, and Certificates IAM, MFA, SSO, Directory Services, and AAA Authorization, Least Privilege, RBAC, Geofencing, and Time-Based Access VPNs and Secure Management Design

12 Domain 4: Segmentation, Risk, and Network Attacks (14%)

Segmentation for Guest, BYOD, IoT, IIoT, SCADA, ICS, and OT Risk, Compliance, Audit, Data Locality, PCI, and GDPR Network Attacks and Scenario Cues Attack-to-Mitigation PBQ Tables

13 Domain 4: Security Controls and Hardening (14%)

Firewalls, IDS, IPS, Security Zones, and Screened Subnets ACLs, Filtering, NAC, Hardening, and Key Management Deception Technologies and Physical Security Zero Trust, SASE, and Trusted or Untrusted Zone Decisions

14 Domain 5: Troubleshooting Methodology and Tools (24%)

Official Troubleshooting Methodology and Evidence Handling Command-Line Tools: ping, traceroute, nslookup, dig, ipconfig, ifconfig, ip, arp, netstat, ss, and route Packet, Protocol, and Wi-Fi Analyzers Choosing the Right Tool by Symptom PBQs

15 Domain 5: Physical, Interface, and Wireless Troubleshooting (24%)

Cable Issues: Type, Attenuation, Crosstalk, Termination, and TX/RX Interface Issues: Errors, Discards, Duplex, Speed, Port Status, and PoE Transceiver, Fiber, and Signal Strength Troubleshooting Wireless Troubleshooting: Interference, Channels, Roaming, RSSI/SNR, Security, and Captive Portals

16 Domain 5: Network Services, Switching, Routing, and Performance Troubleshooting (24%)

DHCP, DNS, NTP, and IP Addressing Issues VLAN, STP, Trunk, Native VLAN, and ACL Issues Routing, Default Gateway, Route Table, and NAT Issues Congestion, Latency, Jitter, Packet Loss, and Application Performance Clues

17 Performance-Based Question Labs

Subnetting and VLSM Design Lab VLAN, Trunk, Router-on-a-Stick, and Firewall Rule Lab Wireless Deployment and Troubleshooting Lab Monitoring, Log Triage, and Route or Service Troubleshooting Lab

18 High-Yield Reference and Final Study Plan

High-Yield Ports and Protocols Table Wi-Fi, Cabling, Connectors, and Transceivers Quick Table Acronyms and Command-Line Tool Quick Table Final 7-Day Review Plan and Readiness Checklist

19 Final Synthesis: Strategy, Remediation, and Readiness

Mixed-Set Decision Strategy for Qualifiers and Close Answers Missed-Question Remediation Notebook by Error Type Exam-Day Time Management and PBQ Order 100-Question Readiness Simulation Blueprint Mapped to N10-009 Weights

Wi-Fi, Cabling, Connectors, and Transceivers Quick Table

Key Takeaways Explain This Topic AI

Media questions ask you to match distance, bandwidth, connector, interference, and installation constraints—pick the medium that fits, not the newest.

Cat 6a carries 10 Gbps to 100 meters; Cat 6 carries 10 Gbps only to about 55 meters; copper Ethernet is capped near 100 m total.

Single-mode fiber (laser, ~9µm core) reaches tens of kilometers; multimode (LED/VCSEL, 50/62.5µm core) is for shorter campus runs.

Transceivers must match speed, media (fiber vs copper), connector, wavelength, and distance—speed alone is never enough.

Wi-Fi design depends on band (2.4/5/6 GHz), channel plan, security (prefer WPA3), antenna, transmit power, and client capability.

Last updated: June 2026

Media and Wireless Quick Tables

Physical-media items on N10-009 (Objectives 1.5 and 2.x) are practical. The stem hands you a distance, environment, speed, or connector constraint and asks for the medium that fits the requirement—not simply the highest-bandwidth option. Memorize the numbers below; distractors are usually a cable rated too short or a transceiver matched on speed alone.

Wi-Fi Quick Table

  • Band Range/density Channel notes
  • 2.4 GHz Longest range, most interference Only 3 non-overlapping 20 MHz channels (1, 6, 11)
  • 5 GHz Shorter range, higher density Many channels; DFS channels avoid radar
  • 6 GHz Shortest range, cleanest spectrum Wi-Fi 6E/Wi-Fi 7 clients only

Generation cheat sheet: Wi-Fi 4 (802.11n) 2.4/5 GHz; Wi-Fi 5 (802.11ac) 5 GHz; Wi-Fi 6 (802.11ax) 2.4/5 GHz; Wi-Fi 6E adds 6 GHz; Wi-Fi 7 (802.11be) adds 320 MHz channels and Multi-Link Operation. Prefer WPA3 where supported and 802.1X/enterprise authentication for managed corporate SSIDs. A captive portal handles guest sign-in but never replaces VLAN and firewall isolation. Good roaming needs cell overlap (~15–20%), matched power, and proper channel planning.

Copper Cabling

  • Cable Max speed / distance Notes
  • Cat 5e 1 Gbps to 100 m Common installed base
  • Cat 6 10 Gbps to ~55 m, 1 Gbps to 100 m Tighter spec than 5e
  • Cat 6a 10 Gbps to 100 m Standard for new 10G drops
  • Cat 7/Cat 8 10–40 Gbps (Cat 8 ~30 m) Cat 8 for short data-center runs

Use plenum-rated (CMP) cable in air-handling spaces where code requires it, shielded twisted pair (STP) in high-EMI areas (and bond/ground it), and RJ45 as the standard endpoint/patch connector. Coaxial (F-type connector) remains for cable broadband.

Fiber Cabling and Connectors

  • Item Best fit Notes
  • Multimode (MMF) Short building/campus links 50/62.5µm core, LED/VCSEL, orange/aqua jacket
  • Single-mode (SMF) Long links, tens of km ~9µm core, laser, yellow jacket
  • LC connector Modern small-form-factor Common on SFP modules
  • SC connector Larger push-pull Older or higher-power
  • UPC polish Low-loss, blue connector Standard data use
  • APC polish Angled, green connector Lowest reflection; never mate to UPC
  • Transceivers and Optics
  • Item What to match
  • SFP Speed, media, connector, wavelength, distance
  • SFP+ 10 Gbps links
  • QSFP/QSFP28 40/100 Gbps aggregation, data center
  • SX optics Short multimode (850 nm)
  • LX/LR optics Longer single-mode (1310 nm)
  • DAC Short direct-attach copper, in-rack
  • AOC Active optical cable, short high-speed
  • Selection Scenarios
  • Requirement Likely answer
  • 10 Gbps to a desk within 100 m Cat 6a with RJ45
  • Building-to-building, electrical noise Single-mode fiber
  • Switch uplink with LC patching SFP+ optic, matching wavelength, LC
  • In-rack 10/25G between switches DAC twinax cable
  • Guest Wi-Fi, Internet only Guest SSID → guest VLAN → firewall policy
  • Worked Scenario: Choosing a Closet Uplink

A wiring closet 220 meters from the core switch needs a 10 Gbps uplink. Cat 6a is immediately disqualified because copper Ethernet is capped at roughly 100 meters regardless of category. Multimode fiber with SR (short-reach, 850 nm) optics typically reaches about 300–400 meters at 10 Gbps over OM3/OM4, so it can work—but if the run is mixed with older OM1/OM2 the budget shrinks fast. The safe, exam-favored answer is single-mode fiber with LR (long-reach, 1310 nm) optics, which comfortably exceeds 10 km. The teaching point is that you reason from distance first, then media, then the matched optic and connector—never the reverse.

Reading a Wireless Survey

Wi-Fi troubleshooting items often hand you signal numbers. RSSI (received signal strength indicator) near −67 dBm is good for data and voice; weaker than about −75 dBm degrades throughput. SNR (signal-to-noise ratio) below ~20 dB means noise is competing with the signal, common near microwaves, Bluetooth, or dense neighboring WLANs on 2.4 GHz. Co-channel interference (cells sharing channel 1, 6, or 11) and adjacent-channel overlap both reduce airtime.

Before adding access points, confirm the channel plan, transmit power, and whether the client even supports the band you deployed—adding a 6 GHz access point does nothing for a Wi-Fi 5 laptop.

PoE Planning Note

Many access points, IP phones, and cameras draw power from the switch. PoE standards set budgets: 802.3af delivers ~15.4 W per port, 802.3at (PoE+) ~30 W, and 802.3bt (PoE++) up to ~60–90 W for pan-tilt cameras and Wi-Fi 6/7 access points. The exam tests whether a switch's total power budget supports all powered devices, not just per-port capacity—forty 30 W devices need a 1200 W budget the switch may not have. If an access point boots, then resets under load, suspect insufficient PoE class or an undersized power supply rather than the radio.

Always match the powered device's class to both the port standard and the switch's aggregate budget.

Common Traps

Selecting copper for long outdoor building-to-building runs (distance and electrical risk).

Mating APC to UPC connectors—the angled and flat polishes do not pair.

Installing non-plenum cable in an air-handling plenum where code requires CMP.

Choosing a transceiver by speed only and ignoring fiber type, connector, and wavelength.

Deploying a guest SSID without VLAN and firewall isolation.

Assuming 6 GHz helps clients that lack 6E/Wi-Fi 7 radios.