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Zorluk: OrtaCommon Ports and Protocols

An enterprise network technician is documenting baseline security parameters and service configurations across network endpoints. Match each network protocol on the left with its corresponding default transport protocol and port specification on the right.

  • SNMP (Simple Network Management Protocol polling)UDP port 161
  • LDAP (Lightweight Directory Access Protocol)TCP port 389
  • POP3 (Post Office Protocol v3)TCP port 110
  • SFTP (SSH File Transfer Protocol)TCP port 22

Cevap

SNMP matches UDP port 161; LDAP matches TCP port 389; POP3 matches TCP port 110; SFTP matches TCP port 22.
Each listed service maps directly to its official IANA transport protocol and default port assignment: SNMP polling traffic communicates over UDP port 161; unencrypted LDAP directory services communicate over TCP port 389; unencrypted POP3 mail retrieval uses TCP port 110; and SFTP uses SSH encapsulation over TCP port 22.

Adım Adım Çözüm

1
Determine transport protocol and default port for SNMP polling.
SNMP manager-to-agent queries rely on low-overhead UDP port 161.
Standard status queries operate over UDP port 161, distinct from SNMP traps which use UDP port 162.
2
Determine transport protocol and default port for LDAP.
Standard LDAP operates over connection-oriented TCP port 389.
Unencrypted directory authentication lookups use TCP 389, whereas encrypted LDAPS uses TCP 636.
3
Determine transport protocol and default port for POP3.
Standard POP3 operates over TCP port 110.
Legacy post office mail download services bind to TCP 110, whereas secure POP3S binds to TCP 995.
4
Determine transport protocol and default port for SFTP.
SFTP operates over TCP port 22.
SFTP leverages the underlying SSH protocol subsystem running on TCP port 22.

Anahtar Kavram

Standard Network Protocol and Port Assignments
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Konular

Common Ports and Protocols

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