Cisco Updated 200-301 Exam Questions and Answers by efa

During STP root port selection, a nonroot switch first chooses the port with the lowest root path cost. The root path cost is the cumulative cost from that switch to the root bridge. Only if there is a tie does STP move to tie-breakers such as the lowest upstream bridge ID, lowest upstream port ID, and then lowest local port ID. This order matters because many wrong answers jump directly to bridge ID or port ID. Cisco CCNA 200-301 v1.1 Network Access tests STP because root-port and designated-port decisions determine which links forward and which links block in a Layer 2 topology. The root bridge itself has no root port; every nonroot switch selects one best path toward the root. The first and most important criterion is lowest path cost to the root bridge. That makes option B correct.

Unused switch ports should not remain active in the default VLAN. The proper hardening approach is to administratively shut them down and move them into an unused access VLAN, often called a parking, black-hole, or unused VLAN. Shutting the port stops an attacker from plugging in and immediately gaining Layer 2 connectivity. Moving the port out of VLAN 1 reduces the impact if someone later enables the port accidentally. EtherChannel is irrelevant because it aggregates links; it does not protect idle user-facing ports. Trunking unused ports is actively dangerous because it could expose multiple VLANs. CDP can disclose device information and is not a protection method for unused ports. Cisco CCNA v1.1 Network Access and Security Fundamentals overlap here: secure access-layer design includes disabling unused interfaces, avoiding the default VLAN for user access, and limiting unintended Layer 2 exposure. Therefore, B and C are the correct operational steps.

A firewall is the device class associated with stateful inspection. Stateful inspection tracks active sessions and uses connection state when deciding whether to permit return traffic or block unexpected packets. For example, if an internal host initiates a TCP session, the firewall can allow matching return traffic because it belongs to a known connection. A Layer 2 switch forwards frames based on MAC addresses and does not inspect transport-layer session state. An access point bridges wireless clients to the wired network, and a wireless controller manages AP behavior and WLAN policy, but neither is the generic stateful-inspection answer in this question. Cisco CCNA 200-301 v1.1 Security Fundamentals requires candidates to know common security device roles: firewall, WSA, AAA server, VPN headend, and access-layer controls. The key phrase is stateful inspection of traffic. That points directly to a firewall. The correct answer is A.

The correct command is ipv6 address 2001:DB8:5:112::/64 eui-64. The wording says the address is generated from a specified IPv6 prefix and the interface MAC address. That is exactly what the eui-64 keyword does: it derives the 64-bit interface identifier from the MAC address and combines it with the configured /64 prefix. The ipv6 address autoconfig command also can create an address, but it learns the prefix from Router Advertisement messages through SLAAC; the prefix is not explicitly specified in the command. DHCPv6 would request addressing information from a DHCPv6 server, and the link-local option shown is not a global unicast address built from the stated prefix. Cisco CCNA v1.1 Network Fundamentals includes IPv6 address types and address configuration methods, and this question tests precise IOS syntax. When the prefix is typed in the command and the MAC-derived interface ID is required, choose the static EUI-64 form, not autoconfig.