Microsoft Networking Essentials Exam Microsoft Networking Essentials 5 — Questions and Answers
Question 1: Which port number is used by the Remote Desktop Protocol (RDP) by default?
- 22
- 23
- 3389 (Correct answer)
- 5900
Correct answer: 3389
RDP (Remote Desktop Protocol) uses TCP port 3389 by default to allow remote graphical desktop connections to Windows systems.
Question 2: What is the difference between a half-duplex and a full-duplex network connection?
- Half-duplex uses wireless; full-duplex uses wired connections
- Half-duplex can only send or receive at one time; full-duplex can do both simultaneously (Correct answer)
- Half-duplex operates at 100 Mbps; full-duplex operates at 1 Gbps
- Half-duplex uses TCP; full-duplex uses UDP
Correct answer: Half-duplex can only send or receive at one time; full-duplex can do both simultaneously
Half-duplex communication allows data to flow in only one direction at a time, while full-duplex allows simultaneous bidirectional data transmission.
Question 3: A company wants to ensure that only authorized computers can connect to their wired network switches. Which technology should they implement?
- MAC address filtering on the router
- 802.1X port-based Network Access Control (Correct answer)
- VLAN tagging on all ports
- DHCP reservation for all clients
Correct answer: 802.1X port-based Network Access Control
802.1X port-based NAC authenticates devices before granting network access, using an authentication server to verify credentials before enabling the switch port.
Question 4: Which DNS record type is used to define the mail server responsible for accepting email for a domain?
- A record
- CNAME record
- MX record (Correct answer)
- NS record
Correct answer: MX record
An MX (Mail Exchanger) record specifies the hostname of the mail server that accepts incoming email messages for a domain.
Question 5: What does the netstat -an command display in Windows?
- The ARP cache with IP-to-MAC mappings
- All active TCP and UDP connections with addresses and port numbers in numeric format (Correct answer)
- The routing table with all known network paths
- All available network adapters and their status
Correct answer: All active TCP and UDP connections with addresses and port numbers in numeric format
netstat -an shows all active network connections and listening ports in numeric format without resolving hostnames, useful for troubleshooting connectivity issues.
Question 6: Which wireless security protocol is currently considered the most secure for protecting Wi-Fi networks?
- WEP (Wired Equivalent Privacy)
- WPA (Wi-Fi Protected Access)
- WPA2-Personal (AES)
- WPA3 (Wi-Fi Protected Access 3) (Correct answer)
Correct answer: WPA3 (Wi-Fi Protected Access 3)
WPA3 is the latest and most secure Wi-Fi security protocol, offering stronger encryption and protection against offline dictionary attacks compared to WPA2.
Question 7: In the context of TCP/IP, what is the purpose of the TTL (Time to Live) field in an IP packet header?
- It specifies how long a DNS record remains cached
- It limits the number of router hops a packet can traverse before being discarded (Correct answer)
- It defines the maximum time a TCP session can remain idle
- It sets the expiration time for a DHCP lease
Correct answer: It limits the number of router hops a packet can traverse before being discarded
The TTL field is decremented by 1 at each router hop; when it reaches zero, the packet is discarded and an ICMP 'Time Exceeded' message is sent back to the source.
Microsoft Networking Essentials Exam Microsoft Networking Essentials 5
Which port number is used by the Remote Desktop Protocol (RDP) by default?