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| Section | Objectives |
|---|---|
| Topic 1: IP Services | - DHCP and DNS concepts - NAT basics |
| Topic 2: WLAN Basics | - Wireless networking fundamentals |
| Topic 3: IP Addressing and Subnetting | - IPv6 fundamentals - IPv4 addressing and subnet masks |
| Topic 4: Network Security Basics | - Basic network security concepts - Access control lists (ACL) |
| Topic 5: Network Management and Troubleshooting | - Device management concepts - Basic troubleshooting tools and methods |
| Topic 6: Switching Technologies | - STP/RSTP concepts - VLAN configuration and trunking |
| Topic 7: Routing Technologies | - Static routing - Dynamic routing fundamentals (OSPF basics) |
| Topic 8: Network Fundamentals | - Basic network topologies and devices - OSI and TCP/IP models |
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NEW QUESTION # 132
What is the broadcast address of the network that contains a host with IP address
192.168.1.147/28?
Answer: A
Explanation:
A /28 subnet mask corresponds to 255.255.255.240, which means each subnet contains 16 IP addresses. The subnet boundaries in the last octet increase in steps of 16: 0, 16, 32, 48, 64, 80,
96, 112, 128, 144, 160, and so on. The host address 192.168.1.147 falls within the subnet range
192.168.1.144 to 192.168.1.159.
In that subnet, the network address is 192.168.1.144, the usable host range is 192.168.1.145 through 192.168.1.158, and the broadcast address is 192.168.1.159. Therefore, option C is correct. Option D is the first usable host address, not the broadcast address.
NEW QUESTION # 133
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 RPC values is calculated by SW4 for the path to SW1?
Answer: B
Explanation:
SW1 is the root bridge, so SW4 calculates its Root Path Cost (RPC) based on the lowest cumulative STP cost path to SW1. The direct link from SW4 to SW1 has a cost of 50, which is lower than all alternative paths through SW3 or SW2. Therefore, SW4 selects the direct path, resulting in an RPC of 50.
NEW QUESTION # 134
A web server and a DNS server are deployed on a network. When a user enters a website address on a client to access a web page, which of the following information does the DNS server return to the client?
Answer: D
Explanation:
When a user enters a website address, the DNS server resolves the domain name to its corresponding IP address. This IP address is then used by the client to locate and communicate with the web server hosting the requested website.
NEW QUESTION # 135
The rules in an ACL may overlap. If packets match the rules with loose conditions, the later ACL rules are not processed. In this case, packets cannot match the rules with strict conditions.
Therefore, the rules with strict conditions must be arranged in front lines and those with loose conditions must be arranged towards the end.
Answer: B
Explanation:
Access Control Lists (ACLs) are processed in sequential order, meaning that once a packet matches a rule, subsequent rules are ignored. To ensure that more specific (strict) conditions are applied, strict rules should be listed first, followed by loose rules.
NEW QUESTION # 136
OSPF supports the division of a network into areas, each identified by an area ID that ranges from 0 to 255. Area 0 is designated as the backbone area.
Answer: A
Explanation:
This statement is false because although Area 0 is indeed the backbone area, the statement about the area ID range is incorrect. In OSPF, the area ID is a 32-bit value, which can be represented either in decimal format or in IPv4 address format such as 0.0.0.0. It is not limited to the numeric range 0 to 255.
For example, an area can be configured as 0, 1, 100, or in dotted-decimal form such as 0.0.0.1 or
0.0.0.10, depending on implementation and configuration style. HCIA-Datacom teaches that OSPF uses hierarchical area design to improve scalability, reduce SPF calculation scope, and optimize LSA flooding. The backbone area, which is Area 0, serves as the transit area connecting all non-backbone areas in a standard OSPF design. Therefore, the second part of the statement is correct, but the first part is wrong, making the entire statement false. This question tests whether the learner understands both the function of Area 0 and the actual format of OSPF area identifiers.
NEW QUESTION # 137
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