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Quizzes > Quizzes for Business > Technology

IP Networking Fundamentals Quiz Challenge

Evaluate subnetting, routing, and connectivity skills

Difficulty: Moderate
Questions: 20
Learning OutcomesStudy Material
Colorful paper art depicting elements related to IP Networking Fundamentals Quiz

Embark on an engaging IP networking journey with this interactive quiz crafted by Joanna Weib. Ideal for IT students and professionals, the IP Networking Fundamentals Quiz tests core topics like subnetting and TCP/IP protocols. Participants can explore detailed feedback and freely tailor the quiz using our quizzes editor. Ready for more? Dive into the Networking Fundamentals Quiz or challenge yourself with the Computer Networking Fundamentals Quiz.

Which of the following represents a valid IPv4 address?
192.168.1.10
192.168.1
1234.5.6.7
256.100.10.1
A valid IPv4 address consists of four octets separated by dots, each ranging from 0 to 255. 192.168.1.10 meets these criteria, whereas the others either have values out of range or incorrect formatting.
What is the default subnet mask for a Class C network?
255.0.0.0
255.255.255.0
255.255.255.128
255.255.0.0
Class C networks use a default mask of 255.255.255.0, which allows for 256 total addresses in the network. The other masks correspond to different network classes or subdivisions.
What is the main purpose of the ARP protocol?
Translate domain names
Establish TCP connections
Map IP addresses to MAC addresses
Route IP packets between networks
ARP (Address Resolution Protocol) is used to resolve an IP address to its corresponding MAC address on a local network. It does not handle routing, TCP connections, or name resolution.
Which protocol uses a three-way handshake to establish a connection?
UDP
OSPF
TCP
ICMP
TCP uses a three-way handshake (SYN, SYN-ACK, ACK) to reliably establish a connection between hosts. UDP is connectionless, ICMP is used for control messages, and OSPF is a routing protocol.
In an IPv4 address, which part defines the network portion when using classful addressing for Class B?
The first two octets
The last two octets
The first octet
All four octets
Class B addresses allocate the first two octets for the network identifier and the last two for host identifiers. This allows for 16,384 Class B networks.
Given the IP 192.168.10.130/26, what is the network address?
192.168.10.0
192.168.10.128
192.168.10.192
192.168.10.64
A /26 mask corresponds to 255.255.255.192, creating subnets in increments of 64. 130 falls in the range 128 - 191, making 192.168.10.128 the network address.
How many usable host addresses are available in a /28 network?
16
12
14
30
A /28 mask provides 16 total addresses (2^(32−28)). Subtracting network and broadcast addresses leaves 14 usable host addresses.
Which transport layer protocol is connectionless?
UDP
TCP
HTTP
SCTP
UDP (User Datagram Protocol) is connectionless and does not establish a handshake before data transfer, unlike TCP. SCTP is connection-oriented, and HTTP is an application layer protocol.
What does CIDR stand for?
Common Internet Data Routing
Classless Inter-Domain Routing
Controlled IP Domain Routing
Classful Internet Domain Routing
CIDR stands for Classless Inter-Domain Routing, a method that enables variable-length subnet masking to optimize IPv4 address allocation. The other terms are incorrect expansions.
If a router has two paths to a destination network, which metric would OSPF use?
Delay
Bandwidth
Cost
Hop count
OSPF uses cost as its routing metric, which is calculated based on interface bandwidth. Hop count is used by RIP, and delay or bandwidth alone apply to other protocols.
Which command shows the routing table on a Cisco router?
show ip route
show running-config
show arp
show interfaces
The "show ip route" command displays the router's IPv4 routing table. The other commands display interface status, ARP cache, and configuration, respectively.
What is the broadcast address for 10.0.0.0/24?
10.0.255.255
10.0.0.1
10.0.0.255
10.0.0.0
With a /24 mask, the last octet is reserved for host addresses. The broadcast address sets all host bits to 1, resulting in 10.0.0.255.
Which protocol is used to translate domain names to IP addresses?
DNS
ARP
DHCP
FTP
DNS (Domain Name System) resolves human-friendly domain names to IP addresses. DHCP assigns IP configurations, ARP resolves MAC addresses, and FTP transfers files.
What is the main role of the default gateway in a host's configuration?
Assign IP addresses
Forward packets to other networks
Encrypt packets
Filter traffic
A default gateway directs traffic destined for external networks to the appropriate router. It does not perform IP address assignment, filtering, or encryption.
In the TCP/IP model, which layer is responsible for routing decisions?
Data Link layer
Transport layer
Internet layer
Application layer
The Internet layer (equivalent to the Network layer) handles routing and forwarding of packets across networks. The Transport layer manages end-to-end communication, while the others handle data link or application services.
Given networks 192.168.1.0/24 and 192.168.2.0/24, what CIDR supernet would summarize both?
192.168.0.0/24
192.168.1.0/23
192.168.0.0/23
192.168.0.0/22
Combining .1.0/24 and .2.0/24 requires a /22 network (192.168.0.0/22) to cover the address range .0 through .3. A /23 would only cover two consecutive /24 networks if they start on an even boundary.
Which algorithm does RIPv2 use for route selection?
Path-vector
Distance vector
Link-state
Hybrid
RIPv2 uses a distance vector algorithm that selects routes based on hop count. Link-state protocols like OSPF, path-vector like BGP, and hybrid protocols like EIGRP use different approaches.
What is the result of the longest prefix match in routing?
The shortest route is chosen
The most specific route is chosen
The first entry in the table is chosen
A random route is chosen
Longest prefix match means the route with the most specific subnet mask (highest prefix length) is selected. This ensures the packet follows the most precise path available.
A packet with TTL=1 arrives at a router, what happens next?
The router resets the TTL to its original value
The router decrements TTL to 0, drops the packet, and returns an ICMP Time Exceeded
The router forwards the packet normally
The router drops the packet silently with no message
When TTL reaches zero after decrement, the router discards the packet and sends an ICMP Time Exceeded message back to the source. This prevents packets from looping indefinitely.
How does fragmentation occur in IPv4?
IPv4 does not support fragmentation
Only routers fragment packets
Only hosts fragment packets
Routers or hosts fragment packets larger than the MTU
IPv4 allows fragmentation at both hosts and routers when a packet exceeds the network's MTU. The fragments are later reassembled at the destination.
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Learning Outcomes

  1. Analyse IP addressing schemes and subnet masks
  2. Identify core TCP/IP protocol functions
  3. Apply subnetting techniques to network scenarios
  4. Demonstrate routing decision-making skills
  5. Evaluate packet forwarding and connectivity

Cheat Sheet

  1. Understand IPv4 vs IPv6 structures - Dive into how IPv4 uses 32 bits with dot-decimal notation (e.g., 192.0.2.1) and IPv6 uses 128 bits in hexadecimal (e.g., 2001:0db8::1). Knowing the bit lengths and notation styles is key to navigating modern networks. Wikipedia: IP address
  2. Learn how subnet masks work - Subnet masks like 255.255.255.0 (/24) split an IP into network and host portions by "masking" off a set number of bits. Mastering this helps you identify which part of the address labels the network and which part labels individual devices. Wikipedia: Subnet
  3. Master subnetting strategies - Subnetting a larger network (e.g., a /24) into smaller chunks (like four /26s) improves organization, security, and efficiency. You'll learn how to borrow bits, calculate ranges, and plan IP allocations like a pro. Wikipedia: Subnet
  4. Explore core TCP/IP functions - From wrapping data in headers (encapsulation) to addressing, routing packets, and handling errors - TCP/IP is the backbone of the internet. Grasping these roles empowers you to troubleshoot and optimize real-world networks. Wikipedia: IP routing
  5. Practice host-count calculations - Use the formula 2^h − 2 (h = host bits) to find usable addresses. For a /26 subnet, 6 host bits yield 62 valid IPs - an essential skill when planning network size and capacity. Wikipedia: Subnet
  6. Understand router decision-making - Routers rely on routing tables and protocols like OSPF and BGP to pick the best path for each packet. Knowing how these protocols exchange and prioritize routes helps you design resilient, scalable networks. Wikipedia: IP routing
  7. Differentiate IP address methods - Unicast sends one-to-one, multicast one-to-many, anycast one-to-nearest, and broadcast one-to-all. Each serves unique needs, from targeted streaming to network-wide announcements. Wikipedia: IP address
  8. Get comfortable with CIDR notation - CIDR (Classless Inter-Domain Routing) uses variable-length masks (e.g., /22) to allocate IPs more flexibly. This avoids the waste of rigid classful addressing and lets you fit networks precisely to demand. Wikipedia: Subnet
  9. Recognize default route importance - A default route (0.0.0.0/0) catches traffic without a specific match, sending it toward external networks or the internet. It's the safety net every routing table needs to avoid "dead end" packets. Wikipedia: IP routing
  10. Review traditional IP address classes - Classes A, B, and C once defined rigid network sizes before CIDR emerged. While mostly historical now, understanding these classes gives context to old documentation and legacy systems. Wikipedia: IP address
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