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WorksheetsNetwork and DNS Quiz
Total questions: 20
Worksheet time: 10mins
What is the primary role of a DHCP relay agent in a network?
To assign IP addresses directly to clients
To forward DHCP broadcast requests across different subnets
To convert DNS queries into IP addresses
To act as a backup DHCP server
A company has DHCP servers only in its data center. Remote branch offices need DHCP services but do not have local servers. Which feature allows branch clients to receive IP addresses from the data center?
DNS forwarder
IP Helper
Proxy ARP
NAT overload
Which DNS record type is used to map a domain name to an IPv4 address?
SOA
MX
A
PTR
Your organization wants to ensure that email traffic is correctly routed to its mail servers. Which DNS record type must be properly configured?
TXT
MX
CNAME
SRV
Which of the following correctly represents the DNS hierarchy from top to bottom?
Sub-domain → Domain → Top-level domain → Root
Root → Top-level domain → Domain → Sub-domain
Top-level domain → Domain → Root → Sub-domain
Domain → Root → Sub-domain → Top-level domain
A security analyst wants to verify that IP addresses correspond to valid hostnames during an investigation. Which DNS record type is most appropriate?
SOA
PTR
SRV
TXT
What is the main purpose of a secondary DNS server?
To assign IP addresses
To handle reverse DNS lookups only
To provide redundancy and load balancing
To store only TXT records
A company uses an external DNS server for public websites but also has an internal DNS server to resolve names for local resources. What is the main benefit of the internal DNS server?
Faster resolution of internet websites
Offloading DHCP services
Improved local network security and control
Handling only email-related queries
What is the role of a cache-only DNS server?
To provide authoritative responses for its own domains
To maintain MX records for email delivery
To store results of queries for faster responses
To register new domain names on the internet
Rey is setting up a new VoIP phone system for his company. The system requires DNS to determine the service location and port numbers for proper call routing. Which DNS record type should Rey configure?
SOA
SRV
TXT
A
Which of the following is NOT a benefit of proper network documentation?
Supports scalability and upgrades
Facilitates troubleshooting
Reduces need for version history
Ensures consistency
Your IT team notices that certain devices on the network no longer match their approved configuration settings. Which practice would best address this issue?
Monitor configuration drift
Perform reverse DNS lookups
Enable DHCP relay agents
Increase bandwidth allocation
Which is a recommended approach for storing network device configuration backups?
Keep backups unencrypted for easy access
Store backups in multiple secure locations
Delete old backups immediately
Share backups with all employees
Your network team wants to track device state changes even if the device is compromised. Which backup management strategy helps achieve this?
Configure remote logging of state data
Maintain a single local backup copy
Disable change management
Increase device memory
Jesikah is leading a change management initiative at her company. She wants to ensure consistent documentation across the organization. Which element of change management should Jesikah implement?
Implement version control
Audit backup schedules
Conduct bandwidth tests
Enable stealth scanning
JaSavion, a network administrator, needs to identify all devices and services running in a subnet at his company. Which tool would be most appropriate?
Wireshark
Nmap
Ping
Netstat
Which Nmap switch allows host discovery without performing a port scan?
–O
–sS
–sn
–A
A penetration tester needs to identify non-responsive hosts while avoiding detection by IDS systems. Which Nmap technique is most suitable?
Default scan
Stealth scan
ARP sweep
Throughput monitoring
Which of the following metrics would best help determine if network latency is increasing over time?
CPU usage
Response time
Storage utilization
Throughput
Archie manages the IT infrastructure for his company. He sets up a monitoring system that generates an alert when bandwidth usage exceeds 85% for more than 10 minutes. What is this an example of?
Baseline establishment
Threshold alerting
Configuration drift
Asset management
