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WorksheetsNetworking Concepts Quiz
Total questions: 50
Worksheet time: 25mins
What is the primary role of DNS in networking?
Encrypt data
Assign IP addresses
Translate domain names to IP addresses
Monitor internet traffic
What would happen without DNS?
Devices won’t connect
Users would type IP addresses instead of domain names
All IPs would be hidden
Browsers would stop working
What is a recursive DNS resolver responsible for?
Registering IP addresses
Sending email
Resolving a DNS query by contacting other servers
Encrypting DNS traffic
What type of attack sends large DNS replies from small queries?
DNS Spoofing
DNS Tunneling
DNS Amplification
DNS Brute-forcing
What does a DNS Spoofing attack do?
Blocks DNS traffic
Sends a fake DNS reply
Encrypts DNS queries
Forces DNS to timeout
How can malware exfiltrate data using DNS?
DNS Encryption
DNS Spoofing
DNS Tunneling
DNS Broadcasting
What port does DNS typically use?
25
80
443
53
Which protocol is faster for normal DNS queries?
TCP
SSH
UDP
FTP
What is the purpose of the command nmap --script=dns-brute
To update DNS cache
To brute-force DNS subdomains
To clear DNS records
To test DNS encryption
What does DHCP do?
Routes packets across networks
Translates domain names
Assigns IP addresses and settings
Creates virtual machines
Which device is considered a DHCP client?
Router
DHCP server
Any device requesting an IP
DNS Resolver
What’s the first message in a DHCP handshake?
Acknowledge
Offer
Discover
Request
In the DHCP process, which device sends the 'Offer'?
Client
Switch
Server
Gateway
What does a DHCP “Lease” refer to?
DNS expiration
Temporary IP assignment
MAC address
VLAN permission
What is the purpose of ipconfig /renew on Windows?
Display DNS records
Assign a static IP
Request a new IP lease
Configure MAC address
Which of the following is a risk associated with DHCP?
Data encryption
Rogue DHCP server
VLAN hopping
DNS redirection
What does the DHCP “Acknowledge” message signify?
IP was rejected
Lease expired
IP address was successfully assigned
Discover failed
What is the main function of NAT?
Encrypt network traffic
Translate private IPs to a public IP
Increase bandwidth
Assign MAC addresses
What does PAT do?
Encrypt DNS traffic
Assign VLANs
Maps ports to internal devices
Disables routers
What command shows your public IP via browser?
ipconfig
nslookup
whatismyip.com
tracert
What does tracert help identify?
MAC address
NAT boundaries
DNS records
VM resources
NAT helps hide:
Public network structure
VLAN IDs
Internal IPs
MAC address
What does ARP do?
Assign IP addresses
Resolve IP to MAC addresses
Encrypt data
Assign subnets
What’s stored temporarily in the ARP cache?
DNS entries
VLAN tags
MAC to IP mappings
DHCP leases
What is ARP Spoofing?
Encrypting MAC addresses
Sending incorrect MAC for an IP
IP lease expiration
MAC address renewal
ARP works only within:
The cloud
WAN
The local network (LAN)
Internet
What is a VLAN used for?
Speeding up Wi-Fi
Separating networks logically
Managing IP addresses
Mapping MAC addresses
What protocol tags VLAN traffic?
802.11
IPv6
802.1Q
DNSSEC
What is VLAN 1?
Reserved for admin
Default VLAN
Public VLAN
DNS VLAN
What does VLAN segmentation help reduce?
IP conflict
DNS lookups
Broadcast domains
DHCP errors
What Nmap command helps scan devices on the same VLAN?
nmap -sn
nmap -p 80 -A
nmap -Pn
nmap --dns-server
What is typically hosted in a DMZ?
Internal workstations
Smart home devices
Public-facing servers
VLAN configurations
What does a DMZ protect?
Switch configuration
DNS logs
Internal LAN from outside attacks
VPN traffic
Where can you find DMZ settings on a home network?
DNS server
Router admin panel
File explorer
Windows registry
What is a common Nmap command to scan DMZ services?
nmap -p 53
nmap -e
nmap -sS
nmap --dns-brute
What is a Virtual Machine?
A router with firewall
Physical hardware
A simulated computer
Network protocol
What does each VM have?
Shared IP
One MAC address
No OS
Shared memory only
What is one advantage of using a VM?
Slower boot time
Easier physical access
Safer testing environment
No internet needed
What does IPAM primarily manage?
DNS security
Public websites
IP usage and records
MAC address filtering
What can IPAM help avoid?
DMZ breaches
VLAN hopping
IP conflicts
DNS tunneling
IPAM is most useful in:
Home networks
Manual address assignment
Large enterprise networks
Browser configurations
Which of these uses both TCP and UDP on port 53?
HTTP
FTP
DNS
Telnet
What port does HTTPS use?
25
80
443
21
What tool do you use to release and renew IP on Windows?
netstat
ping
ipconfig
arp
Which layer handles IP-to-MAC resolution?
Application
Transport
Data Link
Presentation
In the DORA process, which step follows 'Request'?
Offer
Acknowledge
Discover
Response
Why can't Nmap scan across VLANs easily?
VLANs encrypt packets
VLANs are routed
VLANs are logically isolated
NAT prevents access
A traceroute showing few hops could indicate:
Slow internet
DNS failure
Short route or NAT
VLAN segmentation
Which command helps detect NAT presence?
nmap -sS
tracert
nslookup
nmap --traceroute
What information does DHCP NOT provide?
IP Address
MAC Address
DNS Server
Subnet Mask
