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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Typical Campus Networking Solution | 5% | - Typical campus network deployment scenarios - Network reliability and redundancy design - Campus network architecture design - Hierarchical network model (core, aggregation, access) |
| Topic 2: Data Center Network Basics | 5% | - Data center fabric concepts (VXLAN, SDN) - Data center network architecture overview - Cloud computing and virtualization basics |
| Topic 3: Network O&M and Troubleshooting | 10% | - Network documentation and baselining - Common network fault diagnosis - Troubleshooting methodology and process - Network maintenance tools (ping, tracert, display commands) |
| Topic 4: Data Communication Network Basics | 10% | - Basic concepts and life cycle of campus network - Data forwarding process - Basic network concepts, IP network architecture, and standardization organizations - ARP principles - Basic principles and operations of VRP (Versatile Routing Platform) - TCP/UDP principles - OSI and TCP/IP protocol models and functions of each layer |
| Topic 5: Ethernet Technology Basics | 20% | - VLAN principles and configuration - Ethernet overview and frame structure - VLAN intercommunication (sub-interface, VLANIF) - Link aggregation (LACP) - STP / RSTP / MSTP spanning tree protocols - MAC address table and forwarding |
| Topic 6: WLAN Technology Basics | 10% | - WLAN overview and 802.11 standards - WLAN basic configuration and troubleshooting - WLAN networking architecture (AC + AP) - WLAN RF fundamentals (channels, bands) |
| Topic 7: Network Security and Services | 15% | - Network security overview - Firewall basics and security zones - IPsec VPN fundamentals - Network management protocols (SNMP, NTP) - AAA (Authentication, Authorization, Accounting) - FTP / TFTP and file management |
| Topic 8: IP Technology Basics | 25% | - DHCP principles and configuration - IPv4 addressing and subnetting - OSPF fundamentals (single-area) - ICMP protocol - ACL (Access Control List) - Static routing and default routing - NAT (Network Address Translation) - IPv6 basics and address types |
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NEW QUESTION # 106
On the network shown in the figure, the interfaces connecting switches to terminals are access interfaces, and the interfaces connecting switches to each other are trunk interfaces. The administrator configures interface- based VLAN assignment. PC1 and PC3 belong to VLAN 2, and PC2 and PC4 belong to VLAN 3. Trunk interfaces allow packets from VLAN 2 and VLAN 3 to pass through and use the default PVID. The MAC address tables of switches are empty. When SW1 receives a unicast data frame sent from PC1 to PC3, through which of the following interfaces does SW1 not send the data frame?
Answer: A,D
Explanation:
PC1 and PC3 are members of VLAN 2, while PC2 and PC4 are members of VLAN 3. SW1 receives the frame from PC1 on access interface GE1/0/1 and associates it with VLAN 2. Because all switch MAC address tables are initially empty, PC3 ' s destination MAC address is unknown to SW1. The switch therefore floods this unknown unicast frame only through other interfaces that can carry VLAN 2. GE1/0/3 connects to PC3 in VLAN 2, so it is a valid flood port. GE1/0/4 is a trunk that permits VLAN 2 and VLAN 3, so it is also eligible to carry the VLAN 2 frame. SW1 does not send the frame back through GE1/0/1, the ingress interface, and it does not send it through GE1/0/2 because that access port belongs to VLAN 3. Therefore, the interfaces through which SW1 does not send the frame are GE1/0/2 and GE1/0/1, corresponding to A and D.
NEW QUESTION # 107
The following ACL is configured on R1:
[R1] acl 2001
[R1-acl4-bask-2001] rule permit source 192.168.1.3 0
[R1-acl4-bask-2001] rule deny source 192.168.1.3 0
[R1-acl4-bask-2001] quit
If R1 matches packets against ACL rules in ascending order of rule IDs, hosts at 192.168.1.3/24 match the permit rule of the ACL.
Answer: A
Explanation:
ACL rules are matched strictly in ascending order of rule IDs. However, in this ACL, rule 10 (deny) comes before rule 5 (permit) because rule IDs are not necessarily evaluated by statement order unless explicitly defined otherwise in behavior. Since rule IDs define processing order, the deny rule for 192.168.1.3 is evaluated first and matches the traffic, blocking it before it can reach the permit rule. Therefore, hosts at 192.168.1.3/24 do not match the permit rule, making the statement false.
NEW QUESTION # 108
Which of the following DHCPv4 messages are sent by a DHCPv4 server?
Answer: C,D
Explanation:
The normal DHCPv4 address-allocation exchange is commonly summarized as DORA: Discover, Offer, Request, and Acknowledge. A DHCP client that needs configuration begins by sending DHCPDISCOVER to locate available DHCP servers. A server responds with DHCPOFFER, proposing an address and other parameters. The client then sends DHCPREQUEST to indicate the offered address and server it has selected.
Finally, the selected DHCP server sends DHCPACK to confirm the lease and deliver the final configuration.
Therefore, DHCPDISCOVER and DHCPREQUEST are client-originated messages in the standard allocation process, while DHCPOFFER and DHCPACK are server-originated messages. DHCP also defines other messages for lease renewal, decline, release, and negative acknowledgment, but those are not among the answer choices. For the options provided, A, DHCPACK, and D, DHCP OFFER, are the messages sent by a DHCPv4 server. The verified answer is A and D. This server-versus-client message direction is fundamental when interpreting DHCP packet captures and troubleshooting address-allocation failures on enterprise campus access networks.
NEW QUESTION # 109
Network administrators need to manage and maintain devices on the campus network. Which of the following protocols cannot modify device configurations, such as interface IP addresses, device names, and so on?
Answer: B
Explanation:
The protocol that cannot directly modify device configurations such as interface IP addresses or device names is SFTP, so option C is correct. SFTP is a secure file transfer protocol that runs over SSH and is mainly used to upload, download, and manage files between a client and a network device. It is commonly used for tasks such as transferring configuration files, system software, patches, or log files, but it does not itself provide an interactive or structured configuration modification mechanism.
NEW QUESTION # 110
In the 802.11 standard, the 2.4 GHz frequency band is divided into 14 overlapping, staggered 20 MHz channels, numbered from 1 to 14.
Answer: A
Explanation:
The IEEE 802.11 channel plan for the 2.4 GHz ISM band defines channels numbered 1 through 14, with adjacent channel center frequencies separated by 5 MHz. Because a traditional 20 MHz Wi-Fi channel occupies substantially more spectrum than the 5 MHz center-frequency spacing, neighboring channels overlap. This is why WLAN planning normally uses a limited set of non-overlapping or minimally overlapping channels, such as 1, 6, and 11 in many regulatory domains. The fact that fourteen channel numbers exist in the standard does not mean that every country permits operation on every one of them.
Regulatory domains restrict the usable subset; for example, channel 14 is not generally available worldwide and has historically been associated with specific Japanese operation. Huawei APs apply the configured regulatory domain to determine which channels may actually be selected. The statement concerns the standard channelization itself rather than regional permission to use every channel. On that basis, the statement is TRUE and option A is correct.
NEW QUESTION # 111
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