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| Section | Weight | Objectives |
|---|---|---|
| Data Center Network Basics | 5% | - Data center architecture overview - Basic data center networking technologies |
| WLAN Technology Basics | 10% | - 802.11 standards and WLAN components - Basic WLAN configuration - WLAN architecture and working principles |
| Network O&M and Troubleshooting | 10% | - Network monitoring and management tools - Fault diagnosis and troubleshooting methods |
| Network Security and Services | 15% | - ACL, NAT principles and configuration - AAA and basic security technologies - DHCP, DNS, FTP, Telnet services |
| Typical Campus Networking Solution | 5% | - Campus network design and integration - End-to-end networking scenarios |
| Ethernet Technology Basics | 20% | - VLAN, STP, RSTP principles and configuration - Link aggregation and stacking technologies - Ethernet standards and switch principles |
| IP Technology Basics | 25% | - IPv4 addressing, subnetting - IPv6 basics - IP routing basics and forwarding - Static routing, OSPF fundamentals |
| Data Communication Network Basics | 10% | - VRP system basics and operations - ARP, TCP/UDP principles - OSI and TCP/IP protocol models - Basic network concepts and architecture - Campus network basics - Data forwarding process |
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NEW QUESTION # 113
With the release of Wi-Fi 7, wireless networks are now faster, more stable, and more latency-tolerant than ever. Which of the following frequency bands are supported by Wi-Fi 7? (Select all that apply)
Answer: A,B,C
Explanation:
Wi-Fi 7 supports operation in the 2.4 GHz , 5 GHz , and 6 GHz frequency bands, so options A , C , and D are correct. These three bands together provide flexible coverage and capacity options. The 2.4 GHz band offers better propagation and wider coverage, while the 5 GHz and 6 GHz bands provide more channels, higher capacity, and better support for high-speed, low-latency services.
Option B , 9.6 GHz , is incorrect because it is not a Wi-Fi 7 operating band. HCIA-Datacom WLAN content highlights Wi-Fi 7 as a major advancement in wireless performance, bringing improvements in throughput, channel usage, spectrum efficiency, and latency characteristics. The addition and use of the 6 GHz band is especially important because it expands available spectrum resources and helps reduce contention in dense wireless environments. In practical enterprise WLAN design, understanding supported frequency bands is essential for channel planning, interference control, device compatibility assessment, and service optimization. This question checks whether the learner can correctly identify the standard operating bands used by modern Wi-Fi 7 networks.
NEW QUESTION # 114
On the network shown in the figure, the three PCs belong to VLAN 2. When configuring interface-based VLAN assignment, the administrator only forgets to configure the PVID of GE1/0/1. However, PC1 can still communicate with PC2 at Layer 2.
Answer: B
Explanation:
Interface-based VLAN assignment determines the VLAN associated with an Ethernet frame according to the configuration of the receiving interface.
When an access interface receives an untagged frame, the switch assigns the frame to the VLAN specified by its Port VLAN ID (PVID).
In this scenario, the administrator forgets to configure the PVID of GE1/0/1 on SW1. Consequently, the interface retains its default PVID of VLAN 1.
PC1 sends untagged Ethernet frames through GE1/0/1, so those frames enter VLAN 1. Meanwhile, PC2 belongs to VLAN 2.
Because VLAN 1 and VLAN 2 represent separate Layer 2 broadcast domains, the switch does not directly forward traffic between them.
Without additional inter-VLAN routing or changes to VLAN membership, PC1 cannot communicate with PC2.
Therefore, the statement is FALSE.
NEW QUESTION # 115
R1 has the following configurations:
[R1] nat address-group test 1
[R1-address-group-test] section 1 100.1.23.1 100.1.23.254
[R1-address-group-test] mode pat
[R1-address-group-test] quit
[R1] nat-policy
[R1-policy-nat] rule name test
[R1-policy-nat-rule-test] source-address range 192.168.0.0
192.168.255.255
[R1-policy-nat-rule-test] action source-nat address-group test
[R1-policy-nat-rule-test] quit
[R1-policy-nat] quit
[R1] interface GE 0/0/2
[R1-GE0/0/2] nat enable
[R1-GE0/0/2] quit
Which of the following statements is false?
Answer: B
Explanation:
Option C is false. In this configuration, the NAT address group test contains the public address range 100.1.23.1 to 100.1.23.254, and the address group works in PAT mode. Port Address Translation allows multiple different intranet users to share the same public IP address while being distinguished by different transport-layer port numbers. Therefore, intranet users with different private IP addresses do not have to use different post-NAT public IP addresses.
NEW QUESTION # 116
The essence of communication is the transmission and exchange of information between two or more points.
The three elements of communication are the sender, content, and transmission channel of the information.
The receiver of the information is not included among these elements.
Answer: B
Explanation:
This statement is false because the receiver is one of the fundamental elements of communication. In basic communication theory, a complete communication process requires at least four essential elements: the sender, the information or message content, the transmission medium or channel, and the receiver. If the receiver is missing, communication cannot be completed because there is no endpoint to accept, interpret, or respond to the transmitted information.
In datacom networks, this concept maps directly to real networking scenarios. A source host generates data, the data is carried over some medium such as copper, fiber, or wireless, and a destination host receives the data. Network devices such as switches and routers assist the forwarding process, but the fundamental communication model still includes both communicating endpoints. HCIA-Datacom emphasizes the complete sender-to-receiver process when introducing network communication basics, protocol encapsulation, and forwarding. Therefore, excluding the receiver from the communication elements is conceptually incorrect.
The correct understanding is that sender, receiver, information content, and channel together form the essential basis of communication.
NEW QUESTION # 117
DAD enables a node to detect whether an IPv6 address is already in use by another node before assigning it to an interface. This ensures that duplicate unicast addresses do not exist on a network. Which of the following packets are used for DAD? (Select all that apply)
Answer: A,B
Explanation:
Duplicate Address Detection ( DAD ) is an IPv6 mechanism used to verify that a unicast address is not already in use before the address is assigned to an interface. DAD is implemented using Neighbor Solicitation (NS) and Neighbor Advertisement (NA) messages, which are part of the ICMPv6 Neighbor Discovery protocol. Therefore, options A and D are correct.
When a host wants to verify a tentative IPv6 address, it sends an NS message for that address. If another node on the link is already using that address, that node responds with an NA message, indicating the address is duplicated and cannot be assigned. If no NA is received within the required period, the host assumes the address is unique and can use it. Options B and C are incorrect because Router Solicitation (RS) and Router Advertisement (RA) are used for router discovery, prefix advertisement, and stateless address autoconfiguration, not for DAD itself. HCIA-Datacom emphasizes the distinction between Neighbor Discovery functions, including address resolution, next-hop reachability, router discovery, and duplicate address detection in IPv6 networks.
NEW QUESTION # 118
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