UPDATED ACTUAL Exam Questions and
CORRECT Answers
SMTP (Simple Mail Transfer Protocol) - CORRECT ANSWER - 25 TCP
FTP - CORRECT ANSWER - 20, 21 TCP
HTTPS (Hypertext Transfer Protocol Secure) - CORRECT ANSWER - An encrypted
version of HTTP. It uses port 443.
IoT (Internet of Things) - CORRECT ANSWER - a large network of physical objects
including sensors and equipment
OSI Layer 1 - Physical - CORRECT ANSWER - Protocols: 100BaseT, 1000BaseT.
Device: hubs, RJ45, repeater.
OSI Layer 2 - Data Link - CORRECT ANSWER - Protocols: Ethernet, MAC, Frames, crc.
Device: NIC, switch, bridge, WAPs.
OSI Layer 3 - Network - CORRECT ANSWER - Logical addressing, switching type,
route discovery/selection, and packet ordering.
IP, ICMP, ARP, RIP, IPX
Device: Router
, OSI Layer 4 - Transport - CORRECT ANSWER - Protocols (TCP/UDP), windowing,
buffering
Device: N/A
OSI Layer 5: Session - CORRECT ANSWER - Protocols: Log on/ Log off, NetBIOS,
Negotiation
Device: N/A.
OSI Layer 6: Presentation - CORRECT ANSWER - Protocols: compression, encryption.
Device: N/A.
OSI Layer 7: Application - CORRECT ANSWER - Protocols: FTP, HTTP, HTTPS,
POP3, SMTP, IMAP
Device: Gateway
UDP - CORRECT ANSWER - connectionless messaged based protocol with best effort
service.
TCP - CORRECT ANSWER - Transmission Control Protocol, connection oriented
protocol with guaranteed service
ARP - CORRECT ANSWER - Address Resolution Protocol, resolves IP addresses to
MAC addresses.
Loopback address - CORRECT ANSWER - 127.0.0.0 - 127.255.255.255