Examkin

Soru

Zorluk: OrtaNetworking Ports and Protocols

A network administrator is configuring access control list (ACL) rules on a corporate firewall. Match each network service description on the left with its corresponding standard port number and transport protocol on the right.

  • Dynamic Host Configuration Protocol (DHCP) Server daemon listening portUDP Port 67
  • Internet Message Access Protocol over SSL/TLS (IMAPS) secure email retrievalTCP Port 993
  • Server Message Block (SMB) direct TCP file sharingTCP Port 445
  • Network Time Protocol (NTP) clock synchronizationUDP Port 123

Cevap

The correct matches are: DHCP Server daemon listening port matches UDP Port 67; IMAPS secure email retrieval matches TCP Port 993; SMB direct TCP file sharing matches TCP Port 445; NTP clock synchronization matches UDP Port 123.
Each service relies on specific well-known ports and transport layer protocols: DHCP server daemons listen on UDP port 67, secure IMAPS mailbox retrieval runs on TCP port 993, direct network file sharing over SMB runs on TCP port 445, and NTP time synchronization operates on UDP port 123.

Adım Adım Çözüm

1
Identify the port and transport protocol for IP assignment services
DHCP servers receive incoming client broadcast queries on UDP port 67, while clients listen on UDP port 68.
DHCP uses connectionless UDP for fast broadcast/unicast lease discovery and assignment.
2
Identify the port and transport protocol for encrypted mailbox retrieval
IMAPS operates over TCP port 993 (whereas unencrypted IMAP uses TCP port 143).
TCP guarantees reliable delivery, and SSL/TLS wrapping on port 993 secures authentication and message contents.
3
Identify the port and transport protocol for direct network file access
SMB operates directly over TCP port 445 for modern IP networks.
Direct SMB over TCP bypasses older NetBIOS transport layers (ports 137–139).
4
Identify the port and transport protocol for network timing and synchronization
NTP operates using UDP port 123.
NTP relies on the low-overhead delivery of UDP to transmit time packets reliably without TCP handshake delays.

Anahtar Kavram

Standard Well-Known Network Ports and Transport Layer Protocols
Bu soruyu puanla

Konular

Networking Ports and Protocols

Bu konudan daha fazla soru