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Zorluk: OrtaCommon Ports and Protocols

A network engineer is configuring perimeter firewall security rules and monitoring agents across an enterprise environment. Match each protocol on the left with its default port number and operational description on the right. Which pairs correctly associate each protocol with its respective port and function?

  • TACACS+TCP Port 49 – Encrypts full payload data for administrative AAA service communications
  • SIPUDP Port 5060 – Initiates, maintains, and terminates VoIP call sessions
  • BGPTCP Port 179 – Establishes peer routing sessions between autonomous systems
  • SNMP TrapUDP Port 162 – Receives unsolicited status notifications sent from managed agents to NMS

Cevap

TACACS+ corresponds to TCP Port 49 for AAA services; SIP corresponds to UDP Port 5060 for VoIP session control; BGP corresponds to TCP Port 179 for inter-domain routing peer sessions; SNMP Trap corresponds to UDP Port 162 for receiving unsolicited agent notifications.
Each protocol is accurately matched to its default port and transport mechanism: TACACS+ (TCP 49), SIP (UDP 5060), BGP (TCP 179), and SNMP Trap (UDP 162).

Adım Adım Çözüm

1
Identify the primary function and transport requirement for administrative AAA services using TACACS+.
TACACS+ uses TCP port 49 to securely communicate full-payload encrypted access requests.
Centralized AAA protocols require reliable transport over TCP port 49.
2
Identify the signaling protocol used for VoIP session management.
SIP uses port 5060 (typically over UDP for low latency) to set up and tear down multimedia calls.
Voice and video signaling standards use port 5060.
3
Determine the transport mechanism for inter-autonomous system routing updates via BGP.
BGP establishes connection-oriented TCP peering sessions on port 179.
Routing protocol data exchange between BGP peers requires reliable delivery over TCP port 179.
4
Distinguish between standard SNMP queries and SNMP Trap notifications.
While SNMP queries originate from the manager on UDP port 161, unsolicited SNMP Traps are sent by managed devices to the NMS listener on UDP port 162.
Trap notifications specifically target port 162 on the management server.

Anahtar Kavram

Port mapping and transport protocol selection for core network administration, routing, VoIP signaling, and event monitoring.
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Konular

Common Ports and Protocols

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