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| Section | Objectives |
|---|---|
| Topic 1: Network Security Basics | - Basic device security configuration - Access Control Lists (ACL) |
| Topic 2: IP Routing | - Static routing - OSPF routing protocol - BGP fundamentals |
| Topic 3: Network Fundamentals | - Basic network components and operations - OSI and TCP/IP models |
| Topic 4: IPv4 and IPv6 | - IPv4 addressing and subnetting - IPv6 addressing and deployment |
| Topic 5: Ethernet Switching | - Spanning Tree Protocol (STP/RSTP/MSTP) - VLAN configuration and operations - MAC address learning and forwarding |
| Topic 6: Network Services | - DHCP - NAT |
| Topic 7: QoS and Traffic Management | - QoS concepts and mechanisms |
1. In the network shown in the figure, the interconnection lines between RT1, RT2, RT3 and RT4 are all 1000M links except for the shared Ethernet part which is a 10M link. OSPF protocol is run to make the routes interoperable. The four routers all run PIMSM protocol, and the RP is 1.1.1.1. RT1 and RT2 are connected to receivers on their downstream interfaces, and IGMP is enabled on the corresponding interfaces. Then, when the receiver sends a group join request, which of the following routers have (*, G) entries? (Multiple choice)
A) RT3
B) RT4
C) RT2
D) RT1
2. When the router receives multicast data, which of the following searches the multicast forwarding table? (Multiple choice)
A) If there is a corresponding (S, G) entry in the multicast forwarding table, but the interface where the packet actually arrives does not match the inbound interface in the entry, the router discards the multicast data.
B) If there is no corresponding (S, G) entry in the multicast forwarding table, the router discards the multicast data
C) If there is a corresponding (SG) entry in the multicast forwarding table, and the interface where the packet actually arrives matches the inbound interface in the entry, the router forwards the multicast data.
D) If the multicast data RPF interface does not match the incoming interface in the (SG) table entry, the router will update the incoming interface of the table entry to the RPF interface obtained by the check.
3. In SDN networks, which of the following security functions are currently widely used? (Multiple choice)
A) Security Management
B) Security card
C) Apply IPSec at network egress
D) Security Policy
4. The customer's two switches SWA and SWB are connected together through seven Ethernet cables and configured with static link aggregation. The corresponding ports on switch SWA are Ethernet 1/0 Ethernet 1/0/2, Ethernet 1/0/3, Ethernet 1/0/4, Ethernet 1/0/5, Ethernet 1/0/6, and Ethernet 1/0/7. The configuration method is to configure in sequence according to the port order. If each aggregation group of switches SWA and SWB only supports 6 ports, then which of the following is right?
A) When the configuration of each port is consistent, SWA randomly selects one port from the seven ports as the Unselected port of the aggregation group.
B) When all ports are configured the same, Ethernet 1/0/1 is the Unselected port in the aggregation group.
C) When all ports are configured the same, Ethernet 1/0/7 is the Unselected port in the aggregation group.
D) When all ports are configured the same, Ethernet 1/0/6 is the Unselected port in the aggregation group.
5. Two routers RTA and RTB are connected together through a LAN to form a VRRP backup group.
The configuration of each router interface is as follows:
RTA's GigabitEthernet1/0
IP address 192.168.0.252 255.255.255.0
IP address 192.168.1.252 255.255.255.0 sub
Vrrp vrid 1 virtual-ip 192.168.0.254
Vrrp vrid 1 priority 120
Vrrp vrid 2 virtual-ip 192.168.1.254
GigabitEthernet 1/0 of RTB
IP address 192.168.0.253 255.255.255.0
IP address 192.168.1.253 255.255.255.0 sub
Vrrp vrid 1 virtual-ip 192.168.0.254
Vrrp vrid 2 virtual-ip 192.168.1.254
Vrrp vrid 2 priority 120
What can we learn from the above information? (Multiple choice)
A) Router A is the master router of backup group 1, and backup group 2 has no master router
B) Backup group 1 can be successfully established, and backup group 2 can be successfully established
C) Router A is the master router of backup group 1, and router B is the master router of backup group 2
D) Backup group 1 can be successfully established, but backup group 2 cannot be successfully established
Solutions:
| Question # 1 Answer: A,C,D | Question # 2 Answer: C,D | Question # 3 Answer: A,C,D | Question # 4 Answer: C | Question # 5 Answer: B,C |
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