Microsoft Networking Essentials Exam Microsoft Networking Essentials: Final Course 5 — Questions and Answers
Question 1: Which type of server stores usernames, passwords, and group memberships in a centralized directory for network authentication?
- DHCP server
- DNS server
- Active Directory Domain Controller (Correct answer)
- RADIUS server
Correct answer: Active Directory Domain Controller
An Active Directory Domain Controller stores and manages user accounts, credentials, and group policies for centralized authentication.
Question 2: A UTP cable wired according to T568A on one end and T568B on the other end is called a:
- Straight-through cable
- Crossover cable (Correct answer)
- Rollover cable
- Loopback cable
Correct answer: Crossover cable
A crossover cable uses T568A on one end and T568B on the other, used to connect like devices (switch-to-switch, PC-to-PC) without a hub.
Question 3: Which QoS mechanism marks packets with a priority value in the IP header's DSCP field to influence forwarding decisions?
- Traffic shaping
- Differentiated Services (DiffServ) (Correct answer)
- Integrated Services (IntServ)
- VLAN prioritization
Correct answer: Differentiated Services (DiffServ)
DiffServ uses the DSCP field in the IP header to classify and mark traffic, allowing routers to apply different forwarding behaviors per class.
Question 4: Which wireless frequency band typically provides longer range but lower maximum throughput in Wi-Fi networks?
- 2.4 GHz (Correct answer)
- 5 GHz
- 6 GHz
- 60 GHz
Correct answer: 2.4 GHz
The 2.4 GHz band penetrates walls better and provides longer range, but has fewer non-overlapping channels and lower maximum speeds than 5 GHz.
Question 5: What is the purpose of the Gratuitous ARP (GARP) message?
- Request the MAC of the default gateway
- Announce a device's IP-to-MAC binding to update neighbor caches (Correct answer)
- Discover available DHCP servers
- Resolve an IPv6 address to a MAC address
Correct answer: Announce a device's IP-to-MAC binding to update neighbor caches
A Gratuitous ARP is an unsolicited ARP reply a device sends to update ARP caches on other hosts, commonly used after IP address changes or failover.
Question 6: Which feature on a managed switch prevents a single port from flooding the network by limiting the number of MAC addresses it learns?
- VLAN access control
- Port security (Correct answer)
- Storm control
- BPDU guard
Correct answer: Port security
Port security limits the number of MAC addresses allowed on a switch port and can shut down or restrict the port if the limit is exceeded.
Question 7: A technician needs to verify that two hosts can communicate at Layer 3. Which tool is most appropriate for an initial connectivity test?
- Nmap
- Ping (Correct answer)
- Wireshark
- Netstat
Correct answer: Ping
Ping sends ICMP Echo Request packets and measures round-trip time, making it the standard first-step tool for Layer 3 reachability testing.
Microsoft Networking Essentials Exam Microsoft Networking Essentials: Final Course 5
Which type of server stores usernames, passwords, and group memberships in a centralized directory for network authentication?