ccna communicating between networks exam

ccna communicating between networks exam.The above output indicates that the time-range was invoked in two IPv4ACL statements, and the time-range is active.9.2.4 Experiment 4: Configuring Dynamic IPv4ACLsChapter 9 ACLs .125 . How dynamic IPv4 ACLs work. Method for configuring VTY local login. Dynamic IPv4 ACL configuration and debugging methods.The experimental topology is shown in Figure 9-2. This experiment requires that if PC1 wants to access router R3 (IP address 172.16.23.3), it must first Telnet to router R2 successfully before it can access it. Delete the ACLs defined in Experiment 2 and Experiment 3, and keep the RIPv2 configuration.(1)Configure router R2 R2(config)#username cisco privilege 15 password cisco Create a local authentication database R2(config)#access-list 120 permit tcp 172.16.1.0 0.0.0.255 host 172.16.12.2 eq telnet// Allow Telnet access to R2 R2(config)#access-list 120 permit tcp 172.16.1.0 0.0.0.255 host 172.16.23.2 eq telnet// Allow Telnet access to R2 R2(config)#access-list 120 permit tcp 172.16.1.0 0.0.0.255 host 172.16.23.2 eq telnet// Allow Telnet access to R2 R2( config)#access-list 120 permit udp any any eq 520 allow RlPv2 routing protocol R2(config)#access-list 120dynamic CCNAtimeout 60permitip 172.16.1.00.0.0.255 host172.16.23.3/dynamic defines the dynamic IPv4 ACL, named CCNA, timeout defines the absolute timeout of the dynamic ACL in minutes, Note: Only one dynamic IPv4 ACL entry can be configured per ACL, otherwise it will prompt % Only one dynamic entry can be configured per ACL/ [Technical Point].Dynamic JPv4ACL is a CiscoIOS security feature that enables users to temporarily open a gap in the firewall without breaking other configured security restrictions. Dynamic IPv4ACL relies on Telnet connections, authentication, and extended IPv4ACLs to achieve the following benefits in terms of security.