Chapter 3 of 5 · CompTIA Network+ N10-009
Network Operations
Documentation, change management, monitoring, disaster recovery, DHCP, DNS, NTP and remote access.
- 8topics
- 37 minfast track
- 7diagrams and exhibits
- 19%of the exam
Topics in this chapter
Take them in order, or jump to the one you need.
- 1Network Documentation and InventoryLearn the documents that support operations: physical and logical diagrams, rack and cable maps, floor plans, asset inventory…4 min
- 2Lifecycle, Change and Configuration ManagementUnderstand device life cycle with EOL and EOS, patching, change management steps, and configuration management with backups and…4 min
- 3SNMP, Flow Data and LoggingUse SNMP polls and traps, MIBs and OIDs, flow data, packet captures, syslog severity levels and SIEM log aggregation to monitor…Diagram5 min
- 4Interface and Environmental MonitoringRead interface statistics such as errors, discards and utilization, set baselines and alerts, and monitor device health and…4 min
- 5Disaster Recovery ConceptsLearn the DR metrics RPO, RTO, MTTR and MTBF, cold, warm and hot sites, active-active and active-passive designs, and the ways DR…Diagram5 min
- 6DHCP and IPv6 Address AssignmentUnderstand how DHCP leases addresses, scopes, reservations, exclusions, options and relay agents, and how IPv6 hosts use SLAAC…Diagram5 min
- 7DNS and Time ServicesExplain how DNS resolves names, common record types, zones and zone transfers, TTL, DNSSEC, DoH and DoT, and how NTP, PTP and NTS…Diagram5 min
- 8Network Access and Management MethodsCompare site to site and client to site VPNs, split and full tunnels, SSH, console, GUI and API management, jump hosts, and…Diagram5 min
About this chapter
What this chapter covers
Network Operations is about running a network day after day. It covers the records and processes that keep changes safe, the tools that watch the network, the plans for recovering from disaster, the services that give hosts addresses and names, and the ways to reach and manage devices.
The chapter follows the third exam domain and has five syllabus topics. They are organizational processes and procedures, network monitoring, disaster recovery, IPv4 and IPv6 network services, and access and management methods.
How the topics fit together
A well run network is documented, changed under control, monitored, protected against disaster and reachable by administrators.
- Documentation, life cycle and change management keep the network understood and changes safe.
- Monitoring uses SNMP, flow data, logs and interface statistics to show what is happening.
- Disaster recovery sets the targets and sites for restoring service after a major failure.
- DHCP, DNS and NTP provide addresses, names and time for every host.
- Access and management methods cover VPNs, SSH, console and out-of-band access.
Many questions in this chapter ask for the best tool or process for a scenario. Read for the key phrase, such as "who is using the bandwidth" or "how much data can we lose", and match it to the page.
How to use these pages
Each topic page has the same shape, so you can skim for what you need.
- What it is: the idea in plain words.
- How it works: the mechanism, with diagrams, tables and example commands.
- What to remember for the exam: the facts to memorize.
- Common mistakes: the classic traps.
- Check yourself: three questions to test your understanding.
Read the pages in order the first time. Then use the exam facts and the questions for revision.
Ready for more practice?
The full CompTIA Network+ N10-009 question bank has 910 questions, with timed practice exams and an explanation for every answer.
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