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| Section | Weight | Objectives |
|---|---|---|
| Network Security and Services | 15% | - ACL, NAT principles and configuration - DHCP, DNS, FTP, Telnet services - AAA and basic security technologies |
| Data Communication Network Basics | 10% | - Data forwarding process - OSI and TCP/IP protocol models - Campus network basics - VRP system basics and operations - Basic network concepts and architecture - ARP, TCP/UDP principles |
| Network O&M and Troubleshooting | 10% | - Fault diagnosis and troubleshooting methods - Network monitoring and management tools |
| WLAN Technology Basics | 10% | - Basic WLAN configuration - 802.11 standards and WLAN components - WLAN architecture and working principles |
| IP Technology Basics | 25% | - IPv4 addressing, subnetting - IPv6 basics - Static routing, OSPF fundamentals - IP routing basics and forwarding |
| Typical Campus Networking Solution | 5% | - End-to-end networking scenarios - Campus network design and integration |
| Data Center Network Basics | 5% | - Basic data center networking technologies - Data center architecture overview |
| Ethernet Technology Basics | 20% | - Ethernet standards and switch principles - VLAN, STP, RSTP principles and configuration - Link aggregation and stacking technologies |
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NEW QUESTION # 99
The following ACL rule is configured on R1:
[R1] time-range working-time 8:00 to 18:00 working-day
[R1] acl name work-acl basic
[R1-acl4-basic-work-acl] rule deny source 192.168.1.0 0.0.0.255 time-range working-time
[R1-acl4-basic-work-acl] quit
According to the rule, hosts with source IP addresses on network segment 192.168.1.0/24 match the rule from
8:00 to 18:00 on workdays.
Answer: B
Explanation:
The configuration first defines a named time range, working-time, covering 08:00 through 18:00 on working days. It then creates a named basic ACL and applies a deny rule for source network 192.168.1.0/24 using wildcard mask 0.0.0.255, with the rule tied to that time range. A packet from any address in 192.168.1.0 through 192.168.1.255 satisfies the source-address portion of the rule. The time-range condition means the rule is active only during the defined working-time period on the device. Outside that period, this particular rule is not considered a match. A basic ACL is appropriate here because the match depends on source IPv4 address and time, both of which are supported basic-ACL conditions. Whether traffic is ultimately permitted or denied also depends on where the ACL is applied and on any other ACL rules, but the question asks only whether the specified source addresses match this rule during the stated working hours. They do. Therefore, the statement is TRUE and option A is correct.
NEW QUESTION # 100
When a DHCPv4 client first joins a network, it broadcasts a DHCP DISCOVER message using 0.0.0.0 as the source IP address.
Answer: B
Explanation:
The statement is correct because a DHCPv4 client initially does not have a valid IPv4 address.
The HCIA-Datacom V2.0 Training Material describes the DHCP address allocation process, beginning with the Discovery stage.
During this stage, the client broadcasts a DHCP DISCOVER message to locate DHCP servers on the network.
Since the client has not yet obtained an IP address, it uses 0.0.0.0 as the source IP address and
255.255.255.255 as the destination IP address.
The limited broadcast destination allows devices within the local broadcast domain to receive the discovery message.
A DHCP server receiving the request can respond with a DHCP OFFER containing an available address and associated configuration information.
After the DHCP REQUEST and DHCP ACK exchange, the client can begin using its assigned IPv4 address.
Therefore, the statement is TRUE.
NEW QUESTION # 101
When planning IPv4 addresses for a campus network, which of the following methods can you use to assign an IP address to the interface connecting the campus egress device to the WAN?
(Choose all that apply.)
Answer: A,B,D
Explanation:
For IPv4 WAN-facing interfaces in campus networks, valid address assignment methods include static configuration, DHCP-based dynamic allocation, and PPPoE for access authentication and address assignment in broadband scenarios. These are all standard IPv4 mechanisms for obtaining or configuring IP addresses on WAN interfaces.
SLAAC is an IPv6 stateless auto-configuration mechanism and is not used for IPv4 address assignment, so it is not applicable in this context.
NEW QUESTION # 102
On the network shown in the figure, R1 serves as the gateway for PC2 and PC3, and directly connects to S1 through a physical link. GE1/0/1 on S1 is configured as a trunk interface and permits traffic of VLANs 2 and
3. Its PVID retains the default value. Which of the following statements are true if PC2 and PC3 can communicate with each other? (Select all that apply)
Answer: A,B,D
Explanation:
This scenario describes the classic router-on-a-stick inter-VLAN routing design. A single physical interface on R1 connects to switch S1, and multiple sub-interfaces are created on that physical interface to serve as gateways for multiple VLANs. Therefore, if R1 provides Layer 3 gateway functions for VLAN 2 and VLAN
3, sub-interfaces such as GE0/0/1.2 and GE0/0/1.3 must be configured, so option A is correct.
Because PC2 and PC3 are connected to switch S1, S1 learns their source MAC addresses dynamically and stores them in its MAC address table, making option B correct. R1 receives tagged frames from different VLANs on the trunk link and, through its sub-interfaces, can identify and terminate frames for VLAN 2 and VLAN 3, so option C is also correct. Option D is incorrect because hosts in different VLANs do not need to be connected to different physical switches; VLAN separation is logical, not necessarily physical. HCIA- Datacom uses this deployment to explain inter-VLAN communication, 802.1Q trunking, and flexible campus gateway design using limited router interfaces.
NEW QUESTION # 103
On the switched network shown in the figure, STP is enabled on all devices. SW1 is the root bridge. The port costs are shown in the figure. Other parameters retain the default values. After the network is stable, which of the following ports are not root ports? (Select all that apply)
Answer: A,B,D
Explanation:
STP selects one root port on each non-root bridge based on the lowest accumulated path cost toward the root bridge.
SW1 is the root bridge, so SW3 selects GE1/0/2 as its root port because the direct path to SW1 has a cost of
10. Therefore, GE1/0/3 on SW3 is not a root port.
SW2 can reach the root through SW3 with a total cost of 30, which is lower than its direct path cost of 50.
Consequently, GE1/0/3 on SW2 becomes its root port, while GE1/0/1 and GE1/0/2 do not.
SW4 selects GE1/0/1 toward SW3 because that path provides a total root cost of 40.
Therefore, option C identifies a root port, whereas A, B, and D identify ports that are not root ports.
NEW QUESTION # 104
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