Cisco Updated 200-301 Exam Questions and Answers by sunny

Router-on-a-stick inter-VLAN routing uses router subinterfaces, one logical subinterface per VLAN. For VLAN 20 on Ethernet0/0, the subinterface should be Ethernet0/0.20, followed by 802.1Q encapsulation for VLAN 20 and the gateway IP address for that VLAN. The physical interface normally remains without an IP address, while each subinterface receives its own VLAN-tagged configuration. The command encapsulation dot1q 20 tells the router to expect and send frames tagged for VLAN 20 on that subinterface. The IP address 10.20.20.1 255.255.255.0 then becomes the default gateway address for hosts in VLAN 20. Option A incorrectly configures encapsulation and IP addressing under the physical Ethernet0/0 interface. Option C misses the encapsulation command, so the router would not associate the subinterface with VLAN 20. Option D is only a plain routed interface configuration. Cisco CCNA 200-301 v1.1 includes this as a foundational VLAN routing pattern. The correct command set is option B.

FF00::/8 is the IPv6 multicast address block. A multicast address identifies a group of interfaces, and packets sent to that address are delivered to members of the group rather than to one single interface. This is the IPv6 replacement for many IPv4 broadcast-style functions; IPv6 does not use broadcast addresses. 2000::/3 is global unicast address space, used for publicly routable IPv6 addresses. FC00::/7 is unique local address space, roughly comparable in purpose to private IPv4 for internal communication. FE80::/10 is link-local address space, used only on the local link for neighbor discovery and routing-protocol operations. Cisco CCNA v1.1 Network Fundamentals requires recognition of IPv6 address categories by prefix. The easiest way to remember this one is that FF in IPv6 signals multicast. If the question says one packet is intended for a group rather than one destination, choose the multicast block, FF00::/8.

The ACL failed because the packet direction and address roles were wrong, and because an explicit permit is needed after the deny statements. Extended ACL syntax follows source first, then destination. To block traffic from 10.0.10.0/26 going to 10.0.20.0/26 on TCP ports 25 and 80, the source must be the 10.0.10.0 subnet and the destination must be the 10.0.20.0 subnet. If those are reversed, the ACL is matching return traffic or the wrong flow. After the denies, a permit ip any any statement is required at the end; otherwise the implicit deny at the end of every ACL blocks all remaining traffic. The permit must not be placed at the beginning, because ACLs are processed top-down and an early permit would bypass the intended denies. Cisco CCNA v1.1 Security Fundamentals includes ACL behavior, direction, and ordering. The operational fix is therefore to swap source/destination and add the final permit.

A DHCP server maintains address pools and leases IP configuration to clients. The most basic information it holds is the list or range of available IP addresses that can be assigned from a pool, along with related options such as default gateway, DNS servers, domain name, and lease duration. It does not store public DNS name mappings; that is a DNS function. It does not normally store domain usernames and passwords; that belongs to directory or AAA systems. Static MAC-to-IP reservations can exist in DHCP, but the broad answer being tested is the available address pool. Cisco CCNA 200-301 v1.1 IP Services requires candidates to understand DHCP server, client, relay, pool, lease, exclusion, and default-router behavior. When a client sends DHCPDISCOVER, the server selects an address from the configured pool and offers it with network parameters. Therefore, the correct answer is A.