200-301 CCNA · Cisco · Network Fundamentals · Bank updated 2026-09-20
200-301 CCNA practice questions: Network Fundamentals
5 free questions from 14 on this area · answer and explanation for each · no sign-up
These 5 questions come from the Network Fundamentals section of our 200-301 CCNA bank (14 questions on this area, which carries 20% of the real exam). Every question is original, with the correct answer explained and linked to the source it is drawn from.
1/5 · Network Fundamentals · easy
A host interface carries the address FE80::2A0:C9FF:FE12:3456. How does a router treat a packet whose source or destination is that address?
AIt forwards the packet anywhere inside the organization but not out toward the Internet.
BIt does not forward the packet off the link on which it was received.
CIt forwards the packet globally toward the owner of the interface identifier.
DIt replicates the packet to each node attached to the segment.
Show answer & explanation
B is correct. Topic 1.9.a. RFC 4291 lists the type prefixes: multicast FF00::/8, link-local unicast FE80::/10 (binary 1111111010), and global unicast for everything else; anycast addresses are taken from the unicast space and are not syntactically distinguishable. Section 2.5.6 adds that link-local addresses are for use on a single link, for purposes such as automatic address configuration and neighbor discovery, and that routers must not forward packets with link-local source or destination addresses to other links. Unique local addresses (FC00::/7, RFC 4193) are the type that is routed inside a site but not on the Internet.
↗ Cisco 200-301 CCNA v1.1 Exam Topics — Section 1: Network Fundamentals
2/5 · Network Fundamentals · easy
SW1 receives a frame on GigabitEthernet1/0/4 in VLAN 20. The destination MAC address of the frame is 0050.56AB.1234.
SW1# show mac address-table vlan 20
Mac Address Table
-------------------------------------------
Vlan Mac Address Type Ports
---- ----------- ---- -----
20 0050.56ab.9901 DYNAMIC Gi1/0/1
20 0050.56ab.7777 DYNAMIC Gi1/0/4
Which action does the switch take with that frame?
AIt discards the frame and sends an ARP request into VLAN 20 for the destination.
BIt forwards the frame out Gi1/0/1, where the other known address in the VLAN was learned.
CIt floods the frame out each forwarding port in VLAN 20 except Gi1/0/4.
DIt holds the frame in the ingress buffer until the destination address is learned.
Show answer & explanation
C is correct. Topic 1.13.b and 1.13.c. A switch learns only from the source MAC address of arriving frames, so a destination that has not yet transmitted is not in the table. Cisco's note on unicast flooding states that when there is no entry corresponding to the frame's destination MAC address in the incoming VLAN, the unicast frame is sent to all forwarding ports within that VLAN; the ingress port is excluded so the frame is not returned to the sender. The same rule applies to broadcast and unknown multicast frames, which is why flooding scope is bounded by the VLAN.
↗ Cisco 200-301 CCNA v1.1 Exam Topics — Section 1: Network Fundamentals
3/5 · Network Fundamentals
A 10 Gigabit Ethernet link has to be carried 25 km over a newly leased dark-fiber pair between two campuses. Which optic and fiber combination supports that span?
A10GBASE-SR optics over OM3 multimode fiber
B10GBASE-SR optics over OM4 multimode fiber
C10GBASE-LR optics over single-mode fiber
D10GBASE-ER optics over single-mode fiber
Show answer & explanation
D is correct. Topic 1.3.a. The Cisco 10GBASE SFP+ data sheet lists the reaches: 10GBASE-SR at 850 nm reaches 300 m on OM3 and 400 m on OM4 multimode fiber; 10GBASE-LR at 1310 nm reaches 10 km on standard single-mode fiber; 10GBASE-ER at 1550 nm reaches 40 km on standard single-mode fiber. Only the ER optic on single-mode fiber has a distance budget above 25 km. Multimode fiber is a short-reach medium, so distance, not cost, decides this choice.
↗ Cisco 200-301 CCNA v1.1 Exam Topics — Section 1: Network Fundamentals
4/5 · Network Fundamentals
A router interface is configured with only these commands:
interface GigabitEthernet0/1
ipv6 address 2001:DB8:ACAD:10::1/64
Afterwards the interface shows two addresses:
R1# show ipv6 interface brief
GigabitEthernet0/1 [up/up]
FE80::1A2B:3CFF:FE44:5566
2001:DB8:ACAD:10::1
Which statement explains the FE80 address?
AEnabling IPv6 on the interface created a link-local address for the interface's on-link functions.
BThe router accepted a router advertisement and built the address by stateless address autoconfiguration.
CThe address is a unique local address added for reachability between sites inside the organization.
DThe address is the solicited-node multicast group the interface joined for duplicate address detection.
Show answer & explanation
A is correct. Topic 1.8. RFC 4291 assigns the binary prefix 1111111010 (FE80::/10) to link-local unicast and states that routers must not forward any packets with link-local source or destination addresses to other links. Cisco documents the same behavior: link-local unicast addresses can be automatically configured on any interface using the FE80::/10 prefix, and they are used by neighbor discovery and stateless autoconfiguration. That is why a single ipv6 address command produces two addresses on the interface: the configured global one and the automatic link-local one.
↗ Cisco 200-301 CCNA v1.1 Exam Topics — Section 1: Network Fundamentals
5/5 · Network Fundamentals
One branch router has to carry the traffic of two acquired companies whose internal networks both use 10.10.0.0/16. The two networks must not learn each other's routes, no extra hardware may be installed, and MPLS is not deployed anywhere. Which approach meets all three constraints?
ARun each company's routing process inside its own container on the branch router.
BDefine one VRF per company and assign the interfaces facing that company to it.
CDeploy two virtual routers on a hypervisor in the branch and trunk each company's VLAN to one.
DCreate one switched virtual interface per company, each of them in a different VLAN.
Show answer & explanation
B is correct. Topic 1.12. Cisco describes VRF-lite as the feature that supports two or more VPNs where IP addresses can be overlapped among the VPNs; it uses input interfaces to distinguish routes and forms virtual packet-forwarding tables by associating one or more Layer 3 interfaces with each VRF, and it does so without MPLS in the core. An interface belongs to at most one VRF at a time, and verification is per instance with show ip route vrf. Server virtualization and containers are the other two virtualization forms named in this topic, but neither gives one router two independent forwarding tables.
↗ Cisco 200-301 CCNA v1.1 Exam Topics — Section 1: Network Fundamentals
Other 200-301 CCNA areas
The same kind of free sample for every other section of the 200-301 CCNA bank:
Study Network Fundamentals with instant feedback
6 free questions · filter study mode by area and difficulty · error log with spaced repetition · no card, no dumps, no ads.
Create your free account →
ExamDeck is an independent study tool, not affiliated with, endorsed by, or sponsored by Cisco. 200-301 CCNA and related marks are trademarks of their respective owners, used for identification only. Exam facts checked against official Cisco materials (as of September 2026); always confirm current details with the vendor before booking.