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Question

Difficulty: MediumIP Addressing Services

Match each IP addressing service or protocol feature on the left with its core function within network operations on the right.

  • Network Time Protocol (NTP)Synchronizes system clocks across network infrastructure to maintain accurate log timestamping for security auditing.
  • IP Address Management (IPAM)Provides centralized tracking, planning, and monitoring of IP address space allocations across enterprise networks.
  • DHCP SnoopingFilters untrusted DHCP messages on layer 2 switches to prevent rogue DHCP servers from issuing invalid network configurations.
  • Dynamic DNS (DDNS)Automatically updates forward DNS records whenever a client receives a new dynamic IP address leased by DHCP.

Answer

Network Time Protocol (NTP) matches clock synchronization; IP Address Management (IPAM) matches centralized address space tracking; DHCP Snooping matches filtering rogue DHCP server responses; Dynamic DNS (DDNS) matches updating DNS records dynamically.
Each IP service performs a specialized function in enterprise operations: NTP handles time synchronization for log correlation; IPAM offers centralized management and tracking of address space; DHCP Snooping provides switch port security against unauthorized DHCP servers; DDNS provides automated dynamic update capabilities for DNS records.

Step-by-Step Solution

1
Identify the primary function of NTP.
NTP synchronizes time across network devices for consistent logging.
Accurate timestamps are required for system log alignment and security analysis.
2
Identify the primary function of IPAM.
IPAM plans, tracks, and manages IP address allocations across subnets.
Enterprise networks require unified management to prevent address exhaustion and IP conflicts.
3
Identify the primary security function of DHCP Snooping.
DHCP Snooping blocks rogue DHCP servers at the switch interface level.
Untrusted ports are restricted from sending DHCP Offer and ACK messages.
4
Identify the primary function of DDNS.
DDNS automatically modifies DNS records when IP addresses change dynamically.
Hostnames remain resolvable even when client IP addresses change frequently via DHCP.

Key Concept

Core functions of enterprise IP addressing and supporting network services
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Topics

IP Addressing Services

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