300-410 enarsi cbt

300-410 enarsi cbt

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Data and Voice VLAN Configuration Other issues outside the CCNA syllabus include authentication mistakes and route filtering. You could be asked about split horizon (covered earlier),300-410 enarsi cbt, exceeding the maximum hop count, or a firewall blocking RIP traffic. Also, bear in mind that ACLs filter all traffic not specifically permitted. We cover permitting RIP via an ACL entry in the ACL section. Option 129: call server IP address A default command on the router configuration will be ip domain-lookup. If this command has been disabled, then DNS won’t work. Sometimes router administrators disable it because when you mistype a command you have to wait several seconds while the router performs a lookup. You can turn off DNS lookups with the following command: After confirming that the connectivity between the devices is correct, the next logical step is investigating Layer 2 configuration, starting with the configured encapsulation method on the trunk ports, which is usually 802.1Q, the preferred method. Next, make sure that the same encapsulation is configured on both ends of the trunk link. IP address range Subnet mask Lease duration Default gateway DNS server WINS server DTP is a Cisco proprietary point-to-protocol that negotiates a common trunking mode between two switches. DTP will be described in detail later. The following output illustrates how to configure a switch port to use IEEE 802.1Q encapsulation when establishing a trunk: # times multi & trunk 0 Administrative Mode: dynamic desirable Operational Mode: trunk arp-inspection Disabled Switch(config)#errdisable recovery interval ? Port Status : Secure-up The first configuration task when implementing VLAN trunking in Cisco IOS Catalyst switches is to configure the desired interface as a Layer 2 switch port. This is performed by issuing the switchport interface configuration command. Configured MAC Addresses : 1 Sticky MAC Addresses : 0 Aging time : 0 mins VLAN and Trunking Capability codes: (R) Router, (B) Bridge, (T) Telephone, Configuration Revision Number ip route 192.168.1.0 255.255.255.0 192.168.10.1 Switch#show interfaces FastEthernet0/1 status You can also add an IP address to the switch to allow you to Telnet to it for management purposes. This is referred to as a Switch Virtual Interface (SVI). It is a wise precaution to have this management access in a VLAN other than VLAN 1, as shown in the output below: 3.DHCP Request packet: Once the client workstation receives an offer made by the DHCP server, it will send a broadcast (to let all DHCP servers learn that it has accepted an offer from a server) DHCP Request message to a specific DHCP server, again using UDP source port bootpc 68 and destination port bootps 67. The client might have received offers from multiple DHCP servers, but it only needs a single IP address so it must choose a DHCP server (based on an identifier), and this is usually done on a “first-come, first-served” basis.

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