CompTIA Quizzes
IPv4 fundamentals (subnetting)
Start with subnetting, host counts, and masks — diagrams, routing, and ACL come later.
- 01 – IPv4 subnetting L3
4 equal subnets (exam style): /22–/28, RFC 1918.
- 01b – Subnets (3–7) L3
Equal subnets (3–7): find the new prefix and network IDs yourself.
- 02 – Count hosts L2
Usable hosts.
- 03 – Network range L3
Network, first/last host.
- 04 – CIDR → mask L2
Decimal subnet mask.
- 05 – Mask → prefix L2
Find prefix length.
- 06 – Which subnet? L3
Network for host.
- 07 – VLSM (4 subnets) L3
Exam-style VLSM: octet boxes + prefix per subnet (/28, mixed host needs).
- G15 – Mask for subnets & hosts L3
Find prefix for X subnets with Y hosts each (e.g. 710 subnets, 50 hosts).
- G24 – Subnets from topology L2
How many subnets are needed for this topology? (diagram)
Diagram subnetting
Visual drills (original topologies) — exam-style practice, not copied from third-party sites.
- Diagram D01 – Valid interface IP L3
Three LANs: two configured — valid /28 IP for Gi0/3 without overlap (A–D).
- Diagram D03 – More host bits (A/B) L2
Two VLANs on diagram: which has more host bits?
- Diagram D04 – Router on a stick L3
Pick the subinterface config for new VLANs (A–D).
- Diagram D06 – Mask in VLAN design L2
What subnet mask is used for both VLANs shown?
- Diagram D07 – Route → interface L3
Route table + diagram: which interface reaches the destination?
- Diagram D08 – Hosts in block (diagram) L2
How many usable hosts in the highlighted subnet?
- Diagram G25 – Default gateway (ifconfig) L3
ifconfig output: network ID + first usable host as default gateway.
Route summarization & wildcard
Multiple subnets behind a router — wildcard mask or summary CIDR (ACL / OSPF).
- RS RS01 – Wildcard (multiple subnets) L3
Wildcard mask covering several subnets behind a router.
ACL — Access lists (grouped wildcard)
Standard and extended ACLs: permit/deny, network + wildcard for subnets behind a router.
- ACL ACL01 – Wildcard (grouped) L3
Wildcard covering all subnets behind router A.
- ACL ACL02 – Standard ACL permit L3
One IOS line: permit all diagram subnets with network + wildcard.
- ACL ACL04 – Extended ACL L3
Pick the correct extended ACL line.
- ACL ACL06 – Block host to server L3
Standard ACL: block PC2 from file server, allow other traffic (topology, A–D).
Routing Questions
Static routes and next-hop — CCNA-style topology drills.
- RT R01 – Static route L3
Configure a static route from the diagram (A–D).
- RT R02 – Branch static route (R1/R2) L3
Main office — /30 — new office: static route on R1 (A–D).
- RT R03 – Route table (LPM) L3
show ip route: destination IP — longest prefix match, which interface? (A–D)
- RT R04 – Route selection (LPM / protocols) L3
show ip route: EIGRP/RIP/OSPF/IS-IS — which route for destination? (A–D)
- RT R05 – Routing table L3
show ip route: destination route for packet? (A–D)
- RT R06 – Connected routes (LPM) L3
show ip route: which interface for destination IP? (A–D)
- RT R07 – Route mask (LPM) L3
show ip route: subnet mask of the destination route (CCNA style).
- RT R08 – Route metric (LPM) L3
show ip route: metric of chosen route (not AD) — A–D.
- RT R09 – Static route next hop (LPM) L3
show ip route static + topology: shared next hop for two destinations.
- RT R10 – Next hop (routing table LPM) L3
Prefix/interface/next-hop table: LPM → next hop for destination IP.
- RT R11 – Default route next hop L3
show ip route: no match → gateway of last resort → next hop.
- RT R12 – Packet handling (LPM) L3
show ip route: overlapping R/S/D/O — how is the packet handled?
- RT R13 – Static route (shared LAN R1/R2/R3) L3
Shared /24 segment: static route on R1 to reach R3 LAN (A–D).
- RT R14 – Static route (/30 P2P R14/R86) L3
R14 → R86: static route to 172.21.34.0/25 network (A–D).
- RT R15 – Default route (Vlan56/57) L3
show ip route: 10.56.192.1 — no LPM match → next hop (A–D).
- RT R16 – Static route (WAN failover R1/R2) L3
Dual WAN circuits: floating static default (AD 2) when primary fails (A–D).
- RT R17 – Route table (remove static / load balancer) L3
show ip route: after removing static/default routes — which server stays reachable? (A–D)
- RT R18 – Route entry subnet mask L3
show ip route | begin Gateway: subnet mask for route {net} (CCNA style).
- RT R19 – Next hop (static/OSPF LPM) L3
show ip route: S 172.16.3.0/24 vs O 172.16.3.0/28 — LPM → next hop + interface (A–D).
- RT R20 – Dual default routes (AD) L3
R1/R2/R3: two ip route 0.0.0.0 — PC1 to PC3 packets routed how? (A–D)
- RT R21 – Route table host (AD/metric/…) L3
show ip route: host IP — AD, metric, prefix, next hop, interface, or route code (A–D).
- RT R22 – Route table packet (mask/prefix/…) L3
show ip route: packet source/dest — mask, prefix, code, interface, default … (A–D).
- RT R23 – Routing table entry (LPM) L3
Entry # / network / subnet mask table: longest prefix match for host IP (A–D).
- RT R24 – Route table protocol (LPM → interface) L3
Overlapping R/O/D routes: LPM → interface, code, AD, metric, or prefix (A–D).
- RT R25 – Next-hop (least desirable metric) L3
Four routers on shared segment: R1 routing table — next-hop with least desirable metric (A–D).
- RT R26 – Route table protocol → prefix L3
show ip route: which network prefix was learned via RIP, OSPF, EIGRP, or static? (A–D, varied).
- RT R27 – AD → protocol (route) L3
show ip route: for route {prefix}, identify protocol from default AD (RIP/OSPF/EIGRP/BGP, varied).
- RT R28 – Border static (LPM → next hop) L3
Static ip route config on border router: LPM for destination IP → next hop (A–D).
IPv4 Quizzes
- 08 – Private addresses L2
Public or private address.
- 09 – Binary octet L2
8 bits → decimal.
- 10 – Summarization L3
Summarize four /24s.
- 12 – Wildcard mask L3
Inverted mask.
- G13 – Host range L3
First and last usable host for a host IP or network.
- G26 – Hex netmask → 255.x L2
Convert ifconfig hex netmask (e.g. 0xfffffc00) to decimal 255.x.x.x.
IPv6 multicast
ff00::/8, ff02::1/2, solicited-node (NDP), multicast types.
- MC M01 – Multicast? L2
Is this an IPv6 multicast address (ff00::/8)?
IPv6 Quizzes
- 01 – Subnetting (4 subnets) L3
Split into 4 equal subnets.
- 02 – Subnet count L2
How many /64 networks?
- 03 – Network ID? L2
Is the IPv6 address the network ID? (yes/no)
- 04 – Notation L2
Short or full notation.
- 05 – Address types L2
Pick link-local.
- 06 – EUI-64 L3
MAC → link-local.
- 07 – SLAAC/DHCPv6 L2
Read RA flags.
- 08 – ICMPv6/NDP L2
Message type (NS).
- 09 – Dual stack L2
Dual-stack scenario.
- 10 – Aggregation L3
Summarize three /64s.
- 11 – Best practice L1
Typical LAN prefix.
- 12 – Wireshark L2
Source or destination IPv6 from trace.
- 13 – Same subnet? L2
Two IPv6 addresses — same subnet? (yes/no), practice style.
- 14 – IPv6 interface (ISP/LAN) L3
Diagram: ISP / R1 / switch — manual /127 + eui-64 /64 (choose two).
- 15 – IPv6 eui-64 (R1 Gig0/0) L3
R1/R2 + IPv6 block: dynamic Gi0/0 assignment via eui-64 /64 (A–D).
- 16 – IPv6 floating default route L3
show ipv6 route: ND ::/0 [2/0] — floating static default to {nh} (A–D).