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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: High Availability Technologies | 15% | - Device redundancy and failover - VRRP protocol and deployment - Link aggregation (LACP and static mode) |
| Topic 2: Spanning Tree Protocols | 20% | - MSTP configuration and optimization - Root bridge and port roles election - STP, RSTP and MSTP principles - Bridge protocol data units (BPDU) |
| Topic 3: Advanced Switching Features | 20% | - Switch management and monitoring - DHCP relay and snooping - Port security and traffic control - Layer 3 switching and routing protocols |
| Topic 4: Campus Network Overview | 10% | - Campus network architecture and design principles - Hierarchical network model |
| Topic 5: IP Multicast | 15% | - PIM-DM and PIM-SM basics - Multicast concepts and addressing - IGMP protocol versions and operation |
| Topic 6: VLAN Technologies | 20% | - QinQ technology and application - VLAN fundamentals and configuration - VLAN routing and Inter-VLAN communication - Trunk, Hybrid and Access ports |
1. The customer has two switches SWA and SWB connected together through a LAN. The two switches SWA and SWB form a link aggregation group. Check the aggregation group status on SWA as follows:
[SWA] display link-aggregation verbose
Loadsharing Type: Shar -- Loadsharing,NonS -- Non-Loadsharing Port Status: S -- Selected,U -- Unselected Flags: A -- LACP_Activity,B -- LACP_Timeout,C -- Aggregation,D -- Synchronization,E -- Collecting,F -- Distributing,G -- Defaulted,H -- Expired System ID: 0x8000,000f-e245-6bc0 Local:
Port StatusPriority Oper-KeyFlag GE1/0/1S 327682 {ACDEF}KOKOMADE
GE1/0/2S 327682 {ACDEF}KOKOMADE
GE1/0/3S 327682 {ACDEF}KOKOMADE
Remote:
ActorPartner Priority Oper-KeySystemID Flag
GE1/0/125327682 0x8000,000f-e23d-59f0 {ACDEF}KOKOMADE GE1/0/226327682 0x8000 000f- e23d-59f0 {ACDEF}KOKOMADE GE1/0/327327682 0x8000 000f-e23d-59f0 {ACDEF}KOKOMADE What can we learn from the above information?
A) LACP priority is 0x8001
B) A dynamic aggregation group is established between switches SWA and SWB.
C) A static aggregation group is established between switches SWA and SWB.
D) Link aggregation port bandwidth size 2G
2. Regarding the compatibility configuration of MSTP, which of the following is correct? (Multiple choice)
A) Since different vendors have different keys, different summary results may be obtained even if the VLAN instance mappings are the same.
B) When switches from different manufacturers communicate with each other through MSTP, as long as the domain name, revision level, and VLAN instance mapping are configured exactly the same, the switches can be guaranteed to belong to the same MST region.
C) When digest snooping is configured, the H3C switch will use the same hash algorithm and key as the peer vendor when performing digest calculations.
D) H3C switches can achieve MSTP interoperability with switches from other manufacturers by configuring summary snooping.
3. When configuring MSTP, the configuration steps in the regional view include? (Multiple choice)
A) Configure the preferred root bridge and backup root bridge of the instance
B) Configure the mapping between VLAN and instance
C) Use the region-name command to configure the domain name
D) Use the revsion command to configure the revision level
4. The Ethernet1/0/1 port of switch SWA is configured as follows:
Interface Ethernet 1/0/1 port link-type trunk
Port trunk permit vlan 10 port trunk pvid vlan 20
Now we need to change the Ethernet 1/0/1 port of switch SWA to a Hybrid port, with PVID of VLAN 20, and tag the data frames sent from VLAN 10. Which of the following configuration processes is correct?
(Multiple choice)
A) [SWA-Ethernet1/0/1] port link-type hybrid
B) None of the above is correct
C) [SWA-Ethernet1/0/1] undoportlink-type
[SWA-Ethernet1/0/1] portlink-type hybrid
[SWA-Ethernet1/0/1] port hybrid pvid vlan 20
[SWA-Ethernet1/0/1] port hybrid vlan 10 tagged
D) [SWA-Ethernet1/0/1] portlink-type access
[SWA-Ethernet1/0/1] port link-type hybrid
[SWA-Ethernet1/0/1] port hybrid pvid vlan 20
[SWA-Ethernet1/0/1] port hybrid vlan 10 tagged
E) [SWA-Ethernet1/0/1] portlink-type access
[SWA-Ethernet1/0/1] port access vlan 20
[SWA-Ethernet1/0/1] port link-type hybrid
[SWA-Ethernet1/0/1] port hybrid vlan 10 tagged
5. Which of the following statements about the BPDU format of MSTP is correct? (Multiple choice)
A) The port path cost value of the same link can be different in different MSTIs
B) The length of the MST region root ID field is 48 bytes. The high-order two bytes are the bridge priority level. The value range is 0-61440 with a step length of 4096.
C) The definition of the Flags field in the MSTI configuration message is exactly the same as the definition of the Flags field in the RST BPDU
D) The MSTI domain root ID is the ID of the bridge with the highest priority in the MSTI.
Solutions:
| Question # 1 Answer: B | Question # 2 Answer: A,D | Question # 3 Answer: B,C,D | Question # 4 Answer: C,D,E | Question # 5 Answer: A,C |
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