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NEW QUESTION # 49
Drag and Drop Question
On the campus network shown in the figure below, the core switch Core1 functions as a Layer 3 gateway and as a DHCP server to dynamically assign IP addresses to AP1, PC1, PC2, and PC3.
The network below Core1 is a Layer 2 network. WAC1 and R1 are connected to Core1 at Layer
3. AP1 goes online through VLAN 100. VLAN 101 and VLAN 102 are respectively used for the wireless and wired services. Additionally, the tunnel forwarding mode is used for wireless traffic forwarding. Match device interfaces with their respective allowed VLANs. (Note: No additional VLANs are allowed on device interfaces, and interconnection VLANs are not considered.)
Answer:
Explanation:
Explanation:
VLAN 100 -> GE1/0/3 of ACC1
VLAN 101-> GE1/0/2 of Core1
VLAN 102 -> GE1/0/1 of ACC2
VLAN 100 and VLAN 101 -> GE1/0/1 of ACC1
VLAN 100 and VLAN 101 -> GE1/0/3 of Core1
VLAN 102 -> GE1/0/4 of Core1
GE1/0/3 of ACC1 -> VLAN 100: This interface directly connects ACC1 to AP1. Since AP1 goes online through management VLAN 100 and wireless user traffic uses tunnel forwarding mode (where user data is encapsulated inside a CAPWAP tunnel directly to WAC1), the physical link to the AP only needs to pass the untagged management traffic of VLAN 100.
GE1/0/2 of Corel -> VLAN 101: This port links Corel to WAC1. In tunnel forwarding mode, all wireless user data (VLAN 101) is encapsulated inside CAPWAP data tunnels by the AP and sent to the WAC. The WAC then decapsulates this traffic and forwards it into the core switch.
Therefore, the interface facing WAC1 must allow service VLAN 101 to route the decapsulated wireless traffic.
GE1/0/1 of ACC2 -> VLAN 102: This interface forms the uplink from the access switch ACC2 to Corel. Because ACC2 only services PC3 (wired service VLAN 102), its uplink only requires access to VLAN 102.
GE1/0/1 of ACC1 -> VLAN 100 and VLAN 102: This is the uplink interface from ACC1 to Corel.
ACC1 hosts AP1 (which requires management VLAN 100) and PC2 (which belongs to wired service VLAN 102). Therefore, this trunk link must allow both VLAN 100 and VLAN 102.
GE1/0/3 of Corel -> VLAN 100 and VLAN 102: This interface connects Corel down to ACC1. To match the configuration of ACCTs uplink, it must allow both the AP management traffic (VLAN
100) and the local wired user traffic (VLAN 102).
GE1/0/4 of Corel -> VLAN 102: This port connects Corel to ACC2. Because ACC2 exclusively handles the wired clients residing in service VLAN 102, this downlink interface only needs to permit VLAN 102.
NEW QUESTION # 50
On the network shown in the figure, all switches run STP. All links have a path cost of 20, and SW1 is the root bridge. What is the root path cost (RPC) of SW4?
Answer: C
Explanation:
The root path cost (RPC) of a switch is the total path cost from that switch to the root bridge along the selected spanning-tree path. Since SW1 is given as the root bridge, its RPC is 0. Each link in the topology has a path cost of 20 . To determine SW4's RPC, you identify the shortest active STP path from SW4 to SW1.
Based on the topology used in the question, SW4 reaches SW1 through a path containing two links .
Therefore, the total root path cost is 20 + 20 = 40 , which makes option B correct. This is a standard STP calculation. HCIA-Datacom uses RPC as one of the main comparison parameters in root-port election on non- root switches. A lower RPC means a better path toward the root bridge. If multiple candidate ports have the same RPC, the switch then compares the sender's bridge ID and port ID. This question checks whether the learner understands that RPC is cumulative across the spanning-tree forwarding path and is not simply the cost of a single directly connected link unless the switch is directly attached to the root bridge.
NEW QUESTION # 51
UDP does not guarantee data transmission reliability and does not provide packet sorting and traffic control functions. It is suitable for the traffic that has low requirements for data transmission reliability, but high requirements for the transmission speed and delay.
Answer: B
Explanation:
UDP (User Datagram Protocol) is a connectionless protocol that does not provide reliability, packet sequencing, or traffic control. These features are usually managed by TCP, which is used for applications requiring reliable data transmission. UDP's design makes it suitable for real-time applications, such as video streaming or VoIP, where speed and low latency are prioritized over reliability.
NEW QUESTION # 52
The continuous development and innovation of upper-layer services pose higher requirements on general-purpose computing data center networks. Which of the following requirements can be met by deploying M-LAG and Eth-Trunk? (Choose all that apply.)
Answer: B,C,D
Explanation:
M-LAG improves network device redundancy and ensures service continuity in case of device or link failures, which directly supports high availability. Eth-Trunk aggregates multiple physical links into one logical link, increasing total transmission capacity and providing higher aggregated bandwidth. Together, M-LAG and Eth-Trunk also support seamless Layer 2 mobility and VM migration by maintaining consistent forwarding across dual-homed connections in data center environments. Elastic scalability is more related to architecture expansion and cloud resource elasticity rather than directly provided by M-LAG or Eth-Trunk mechanisms.
NEW QUESTION # 53
At the egress of an enterprise campus network, which of the following technologies can the administrator deploy to allow only specific private IP addresses to access the Internet?
Answer: D
Explanation:
At the enterprise campus network egress, the technology used to control which private IP addresses can access the Internet is NAT, typically combined with ACLs. NAT performs address translation for private IPs to public IPs and can be configured with policies to restrict which internal addresses are allowed to be translated and forwarded to the Internet. SSH, FTP, and AAA are not used for traffic forwarding control at the network egress.
NEW QUESTION # 54
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