Telecommunications Telecommunications Protocols 1 — Questions and Answers
Question 1: What is the purpose of BGP in the internet?
- Assign IP addresses within a LAN
- Exchange routing information between autonomous systems (Correct answer)
- Manage DNS zone transfers
- Authenticate VPN tunnels
Correct answer: Exchange routing information between autonomous systems
BGP (Border Gateway Protocol) is the inter-domain routing protocol that manages how packets are routed between autonomous systems on the internet.
Question 2: What is the primary purpose of MPLS in carrier networks?
- Provide wireless encryption
- Forward packets using short labels rather than long IP table lookups (Correct answer)
- Assign public IP addresses to customers
- Manage SONET ring protection
Correct answer: Forward packets using short labels rather than long IP table lookups
MPLS (Multiprotocol Label Switching) improves packet forwarding efficiency by using short labels instead of complex IP routing table lookups.
Question 3: What does SS7 stand for in telecom signaling?
- Structured Signal Standard 7
- Signaling System Number 7 (Correct answer)
- Secure Session Standard 7
- Switched Service System 7
Correct answer: Signaling System Number 7
SS7 (Signaling System No. 7) is the protocol suite used by PSTN carriers worldwide to set up and tear down telephone calls and manage services.
Question 4: What protocol does OSPF use for route advertisements?
- TCP unicast
- UDP broadcast
- IP multicast (protocol 89) (Correct answer)
- ICMP
Correct answer: IP multicast (protocol 89)
OSPF uses IP protocol 89 with multicast addresses (224.0.0.5 and 224.0.0.6) to exchange link-state advertisements.
Question 5: What is the primary difference between TCP and UDP?
- TCP is faster; UDP is slower
- TCP provides reliable delivery with acknowledgments; UDP is connectionless with no guarantees (Correct answer)
- TCP uses less overhead; UDP uses more overhead
- TCP is for voice; UDP is for data
Correct answer: TCP provides reliable delivery with acknowledgments; UDP is connectionless with no guarantees
TCP guarantees delivery through acknowledgments and retransmissions, while UDP is faster but provides no delivery guarantees.
Question 6: What does ICMP primarily provide?
- Reliable data transfer
- Network diagnostics and error reporting (Correct answer)
- Dynamic IP address assignment
- Encrypted tunneling
Correct answer: Network diagnostics and error reporting
ICMP (Internet Control Message Protocol) provides error reporting and network diagnostics, used by tools like ping and traceroute.
Telecommunications Telecommunications Protocols 1
What is the purpose of BGP in the internet?