4.0 IP Services

Accounting for 10% of the CCNA exam, this domain focuses on the operational services that make networks manageable and functional, including address translation, time synchronization, and logging.

Domain Readiness

Complete all 6 sub-modules to unlock the Domain 4.0 assessment.

Overall Progress0%

MSP Critical Focus: NAT & Relays

While the CCNA tests on the theory of QoS and SNMP, you will configure NAT (Port Forwarding) and DHCP Relays (IP Helpers) almost daily at an MSP. Make sure you fully understand the difference between inside local, inside global, outside local, and outside global addresses.

Study Modules

4.1 Network Address Translation (NAT)

Planned

Configure Inside Source NAT. Master Static NAT (1-to-1 mapping) and PAT/Overload (many-to-1) for internet access.

Initialize Sequence

4.2 Network Time Protocol (NTP)

Planned

Configure routers to act as NTP clients and servers. Understand why precise time sync is critical for Syslog and cryptography.

Initialize Sequence

4.3 DHCP & DNS Roles

Planned

Explain the role of DHCP and DNS within the network. Master the 'ip helper-address' command for DHCP Relay over Layer 3 boundaries.

Initialize Sequence

4.4 SNMP & Syslog

Planned

Understand Simple Network Management Protocol (v2c/v3) operations and interpret Syslog severity levels (0-7).

Initialize Sequence

4.5 Quality of Service (QoS)

Planned

Describe Per-Hop Behavior (PHB). Compare classification, marking, queuing, congestion, policing, and shaping.

Initialize Sequence

4.6 Remote Access & File Transfer

Planned

Configure SSH for secure CLI access. Use TFTP and FTP for backing up configurations and upgrading Cisco IOS images.

Initialize Sequence