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What does TMOS stand for in F5 BIG-IP architecture?

Traffic Management Operating System

Transport Mode Operating Software

Tiered Module Orchestration Service

Traffic Mirroring Orchestration System

to track

2026 Statistics

Key Facts: F5-CA Exam

~80

Exam Questions

245/300

Passing Score

F5 (scaled ~80%)

90 min

Exam Duration

$180

Exam Fee

Pearson VUE

2 years

Certification Validity

Exam 101

Prerequisite

Application Delivery Fundamentals

F5-CA (exam 201 TMOS Administration) has ~80 questions in 90 minutes with a passing score of 245/300 scaled (~80%). Prerequisite: pass exam 101 Application Delivery Fundamentals. Valid for 2 years. Exam fee ~$180 at Pearson VUE. Covers TMOS architecture, BIG-IP platforms, LTM fundamentals, HA, management, and basic iRules.

Sample F5-CA Practice Questions

Try these sample questions to test your F5-CA exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1What does TMOS stand for in F5 BIG-IP architecture?

A.Traffic Management Operating System

B.Transport Mode Operating Software

C.Tiered Module Orchestration Service

D.Traffic Mirroring Orchestration System

Explanation: TMOS stands for Traffic Management Operating System. It is F5's purpose-built operating system that runs on BIG-IP platforms and provides the foundation for modules like LTM, DNS, ASM, APM, and AFM. TMOS includes the TMM (Traffic Management Microkernel) which handles all data-plane traffic.

2Which BIG-IP component handles all data-plane traffic processing?

A.Linux host kernel

B.TMM (Traffic Management Microkernel)

C.iControl REST API

D.MCPD (Master Control Program Daemon)

Explanation: TMM (Traffic Management Microkernel) is the core data-plane process in TMOS. It runs on dedicated CPU cores (Data Plane CPUs) and processes all client/server traffic through virtual servers, pools, and profiles. The Linux host handles control-plane tasks but not data traffic.

3Which two CPU types exist on a BIG-IP appliance?

A.Primary CPU and Secondary CPU

B.Host CPU and Data Plane CPU

C.Control CPU and Management CPU

D.Physical CPU and Virtual CPU

Explanation: BIG-IP platforms separate Host CPUs (running Linux for control-plane tasks like web GUI, SSH, MCPD) from Data Plane CPUs (dedicated to TMM for traffic processing). This separation ensures management activity does not impact traffic-handling performance.

4What is the primary difference between a Full Proxy and a Packet Forwarding architecture?

A.Full Proxy only works with HTTP

B.Full Proxy terminates both client and server connections separately

C.Packet Forwarding requires more memory

D.Packet Forwarding supports SSL offload

Explanation: A Full Proxy terminates the client-side connection and establishes a separate server-side connection, allowing BIG-IP to inspect, modify, and optimize traffic in both directions. Packet Forwarding (such as Fast L4 without hardware acceleration) simply forwards packets between client and server without terminating the connection.

5Which BIG-IP platform is a hardware appliance line designed to replace iSeries?

A.VIPRION

B.vCMP

C.rSeries

D.BIG-IP Next

Explanation: rSeries is F5's modern hardware appliance line that replaces the iSeries platforms. It runs F5OS as the base operating system and can host multiple BIG-IP tenants. VELOS is the modular chassis equivalent that replaces VIPRION.

6What is vCMP on BIG-IP?

A.A clustering protocol

B.Virtual Clustered Multiprocessing that hosts multiple BIG-IP guests on one chassis

C.A DNS resolution feature

D.A certificate management system

Explanation: vCMP (Virtual Clustered Multiprocessing) is an F5 hypervisor technology that allows multiple BIG-IP guest instances to share the same physical hardware. Each guest is allocated dedicated CPU cores and memory and runs its own TMOS instance.

7Which BIG-IP deployment option runs as a software image in public clouds such as AWS or Azure?

A.vCMP guest

B.Virtual Edition (VE)

C.rSeries tenant

D.VELOS blade

Explanation: BIG-IP Virtual Edition (VE) is a software-only version of BIG-IP that can be deployed as a virtual machine in VMware, Hyper-V, KVM, AWS, Azure, GCP, and OpenStack environments. It provides the same TMOS features as hardware appliances.

8Which licensing model applies to BIG-IP Virtual Edition via BIG-IQ Centralized Management?

A.Perpetual Only

B.Utility / Subscription with BIG-IQ license pools

C.Only free tier

D.Hardware warranty tied

Explanation: BIG-IQ Centralized Management supports utility and subscription licensing pools for BIG-IP VE instances. License pools allow dynamic assignment and revocation of licenses to VE instances, useful for elastic cloud deployments and auto-scaling.

9Which BIG-IP module provides Layer 4-7 load balancing and is the foundational module?

A.APM

B.ASM

C.LTM

D.AFM

Explanation: LTM (Local Traffic Manager) is the foundational BIG-IP module. It provides L4-L7 load balancing, SSL/TLS offload, connection optimization, iRules, and health monitoring. Most other modules (ASM, APM, AFM) build on LTM functionality.

10Which BIG-IP module is a Web Application Firewall (WAF)?

A.LTM

B.DNS

C.ASM / Advanced WAF

D.AFM

Explanation: ASM (Application Security Manager), now marketed as Advanced WAF, is F5's Web Application Firewall. It protects against OWASP Top 10 threats, bots, DDoS at L7, API abuse, and zero-day attacks using signatures and behavioral analysis.

About the F5-CA Exam

The F5 Certified! BIG-IP Administrator (F5-CA) — Exam 201 TMOS Administration — validates foundational skills to administer F5 BIG-IP running TMOS. It covers TMOS architecture (TMM, host vs data-plane CPU), platforms (iSeries, rSeries, VELOS, Virtual Edition, vCMP), LTM virtual servers, pools, monitors, persistence, SNAT, high availability (Sync-Failover device groups, Traffic Groups, ConfigSync, connection mirroring), management (TMSH, Configuration Utility, iControl REST, UCS archives, qkview), SSL/HTTP/TCP profiles, and basic iRules.

Questions

80 scored questions

Time Limit

90 minutes

Passing Score

245/300 scaled (~80%)

Exam Fee

$180 (F5 / Pearson VUE)

F5-CA Exam Content Outline

20%

TMOS and BIG-IP Platform Concepts

TMOS architecture (TMM, host vs data-plane CPU, full proxy vs packet forwarding), BIG-IP platforms (iSeries, rSeries, VELOS, Virtual Edition, vCMP), licensing (perpetual, subscription, BIG-IQ license pools), module provisioning (LTM, DNS, ASM, APM, AFM)

35%

LTM Fundamentals

Virtual server types (Standard, Performance-L4, Forwarding-IP, Forwarding-L2, Reject, Performance-HTTP), pools and nodes, health monitors (TCP, HTTP/HTTPS, ICMP, External EAV, Inband), load balancing methods (Round Robin, Ratio, Least Connections, Observed, Predictive, Fastest), persistence (source-address, cookie variants, SSL Session ID, universal), SNAT (Automap, pool, none)

20%

Management and Operations

TMSH command structure, Configuration Utility, iControl REST basics, administrative partitions, user roles (Administrator, Resource Admin, Manager, Auditor, Certificate Manager, Application Editor, Guest), AAA (RADIUS, TACACS+, LDAP, AD), UCS archives and SCF, qkview and iHealth

15%

High Availability

Sync-Failover device groups, Traffic Groups (Active/Active vs Active/Standby), ConfigSync, connection and persistence mirroring, HA Group scores, network failover, floating vs non-floating Self IPs

10%

Profiles, SSL, and iRules Basics

Client-SSL and Server-SSL profiles (SNI, TLS 1.3, mTLS), HTTP profile (XFF, redirect rewrite, OneConnect), TCP/UDP profiles, basic iRules (HTTP_REQUEST, HTTP::host, HTTP::uri, HTTP::redirect, pool command)

How to Pass the F5-CA Exam

What You Need to Know

Passing score: 245/300 scaled (~80%)
Exam length: 80 questions
Time limit: 90 minutes
Exam fee: $180

Keys to Passing

Complete 500+ practice questions
Score 80%+ consistently before scheduling
Focus on highest-weighted sections
Use our AI tutor for tough concepts

F5-CA Study Tips from Top Performers

1Master TMOS architecture: TMM, full proxy vs packet forwarding, host vs data-plane CPUs

2Memorize virtual server types (Standard, Performance-L4, Forwarding-IP/L2, Reject) and when to use each

3Know load balancing methods cold: Round Robin, Ratio, Least Connections, Observed, Predictive, Fastest

4Understand persistence options: source-address, cookie (insert/rewrite/passive/hash), SSL session ID, universal

5Practice TMSH commands: list, show, save, modify, create in ltm/net/sys/cm modules

6Understand HA concepts: Sync-Failover device groups, Traffic Groups, ConfigSync, connection mirroring, HA Group

7Build lab virtual edition (free BIG-IP VE trial) and practice real configs — hands-on beats memorization

Frequently Asked Questions

What is the F5-CA exam?

F5 Certified! BIG-IP Administrator (F5-CA) is F5's entry-level administrator credential. It is earned by passing exam 201 TMOS Administration (after prerequisite exam 101 Application Delivery Fundamentals). It validates hands-on skills in administering BIG-IP TMOS: LTM, virtual servers, pools, monitors, HA, TMSH, and basic profiles/iRules.

How many questions are on the F5-CA 201 exam?

Exam 201 has approximately 80 multiple-choice questions to be completed in 90 minutes. The passing score is 245 out of 300 scaled (~80%). Questions test real-world BIG-IP TMOS administration scenarios, not just recall.

What are the F5-CA prerequisites?

You must first pass exam 101 Application Delivery Fundamentals before you can sit for exam 201 TMOS Administration. Exam 101 covers OSI model, TCP/IP, HTTP, DNS, SSL/TLS, load balancing concepts, and security fundamentals.

How much does the F5-CA exam cost?

The F5 201 TMOS Administration exam fee is approximately $180 USD at Pearson VUE (varies by region). You also need to pass the 101 prerequisite, which is similarly priced. F5 occasionally offers discount vouchers through training partners and F5 University.

How long is F5-CA certification valid?

F5 certifications — including F5-CA — are valid for 2 years. To recertify, candidates must pass the current version of the same exam or a higher-level F5 exam within the credential path before expiration.

What jobs can I get with F5-CA certification?

F5-CA is aimed at network administrators, systems engineers, and junior application delivery engineers. Typical roles: Network Engineer, Load Balancer Administrator, BIG-IP Administrator, Application Delivery Engineer, and NOC engineer. It is a common requirement at telcos, banks, large enterprises, and MSPs that run BIG-IP.