Cisco Updated 200-301 Exam Questions and Answers by kaiden

TCP is reliable and connection-oriented; UDP is connectionless and does not provide transport-layer reliability. TCP establishes a session before data transfer and uses sequence numbers, acknowledgments, retransmissions, and flow control. That behavior is useful for applications that cannot tolerate missing or out-of-order data, such as file transfers, web sessions, and many application transactions. UDP avoids session establishment and reliability tracking. It sends datagrams with less overhead, which is useful for DNS, DHCP, streaming, voice, and other traffic where speed or application-level handling is preferred. Cisco CCNA 200-301 v1.1 Network Fundamentals expects this contrast to be automatic. The incorrect choices reverse reliability or connection behavior. Do not confuse UDP ' s checksum with reliable delivery; a checksum can detect corruption, but it does not guarantee retransmission or ordering. In the language of the answer options, TCP is reliable and connection-oriented, while UDP is not reliable and is connectionless.

Answer C is the technically correct selection. VLAN hopping is reduced by moving the native VLAN away from VLAN 1 and using an unused VLAN ID for untagged trunk traffic. A double-tagging attack depends on the attacker reaching a trunk that uses the same native VLAN, so making the native VLAN unused removes that easy path. This aligns with Cisco CCNA 200-301 v1.1 because the exam blueprint requires engineers to recognize operational behaviour from configuration symptoms and topology requirements. Dynamic ARP Inspection protects ARP, not VLAN tags; ACLs do not stop trunk negotiation; port security alone does not fix native VLAN exposure. Treat the distractors carefully: most are real Cisco terms, but they solve a different problem or operate at a different layer. The selected answer is the one that would be used by an engineer on the device or in the design to produce the outcome stated in the question.

Answer A is the technically correct selection. A DHCP relay agent forwards DHCP broadcasts across routed boundaries. Because routers do not normally forward broadcasts, the relay receives DHCPDISCOVER from the client subnet and unicasts it to the configured DHCP server. This aligns with Cisco CCNA 200-301 v1.1 because the exam blueprint requires engineers to recognize operational behaviour from configuration symptoms and topology requirements. A DHCP pool makes the router a server, DHCP binding records leases, and DHCP snooping is a switch security feature. Treat the distractors carefully: most are real Cisco terms, but they solve a different problem or operate at a different layer. The selected answer is the one that would be used by an engineer on the device or in the design to produce the outcome stated in the question.

The verified answer is C and E. Dual-homed branches and dynamic routing improve WAN resiliency and scalability. Dual homing gives a branch more than one upstream path, and dynamic routing lets the network converge automatically when a link or router fails. Cisco CCNA 200-301 v1.1 places this skill in IP Connectivity, where the exam expects a working understanding of how the feature behaves on real Cisco networks, not just a memorized command. Single-homed branches and static routing are simpler but less resilient; asynchronous routing is not the design improvement being tested. In production, this distinction matters because a misapplied command or design choice usually creates an outage, a security gap, or unnecessary troubleshooting noise. The correct choice matches the control-plane, data-plane, wireless, security, or services behaviour described in the scenario and should be preferred over options that merely sound related.