ccna 200-301 network simulator ns2 simulator tutorial

ccna 200-301 network simulator ns2 simulator tutorial.9. Solution: AD The question asks: What is the benefit of using a router to segment a network (choose 2)? Routers work at Layer 3, the network layer of devices, and can implement filtering based on information from all three layers, so A is correct; a router is able to isolate broadcasts and prevent them from propagating from one broadcast domain to another, but it has no way to eliminate them, so B is wrong; routers are generally more expensive than switches, not cheaper, so C is wrong; broadcasts cannot be routed throughD is correct; adding a router to the network will increase latency, which, as already described, is greater for routers than for switches and for switches than for hubs, so E is wrong.10. solution.AC question asks: What functions do routers perform in a network (choose 2)? The main functions performed by a router in a network are packet switching and path selection. Path selection selects the correct path and then exchanges the packets to the corresponding ports. Therefore, A and C are correct. Option B mentions access layer security, which is generally implemented on the access layer switch. Option D refers to the assignment of VLAN membership. VLANs are also configured on the switch, not the router. Option E mentions bridging LAN segments, and routers perform routing rather than bridging between LAN segments. Option F refers to differential broadcast domains, which are lessRealistically, routers can be used to separate broadcast domains, but the differencing is more work and more costly. Therefore, only A and C are correct. It is easier to choose the correct answer directly to this question, and it is relatively easier to do this question if you study the entire book.11.Solution.AF question asks: which of the following statements describes the network in the figure (choose 2)? This question asks about broadcast and conflict domains. The network devices involved are hubs, switches, and routers. hubs are at the physical layer, and all interfaces belong to the same conflict domain and a broadcast domain; switches are at the data link layer, and each interface is a separate conflict domain. all ports of non-VLAN switches belong to the same broadcast domain, and if they are VLAN switches, each VLAN is a broadcast domain; the router is at the network layer, and each port is a separate conflict domain and a separate broadcast domain. The left side of the router in the figure is a broadcast domain and a conflict domain; the right side of the router has a broadcast domain because only one sector is connected to the switch, indicating that there is only oneThe VLANO switch has 5 ports connected to the Production department and 1 port connected to the router, so there are 6 conflict domains on the right side because each port of the switch is a conflict domain. There are 2 broadcast domains and 7 conflict domains in the entire network.12. Solution: BQuestion Q: Referring to the diagram, how many conflict domains are there in the diagram? According to the previous question, there is 1 conflict domain on the left side of the router and 1 conflict domain on the right side, for a total of 2 conflict domains.