300-420 exam topics

300-420 exam topics

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Administrative Trunking Encapsulation: dot1q Operational Trunking Encapsulation: dot1q Negotiation of Trunking: Disabled * - candidate default,300-420 exam topics, U - per-user static route, o - ODR If you have SSH enabled, you should probably disable Telnet and HTTP. When you enter the transport input command, any protocol entered after it is allowed. Any protocol not entered is not allowed. In the output below, you can see that only SSH is allowed: Version : oer-paths Display all oer controlled paths paths Path information U - per-user static route, o - ODR, P - periodic downloaded static route Port Name Status Vlan Duplex Speed Type Fa0/1 errdisabled 100 full 100 100BaseSX Dynamic desirable Dynamic auto VTP Lab ip default-network Spend 15 minutes on subnetting.org Review yesterday’s theory notes and labs By default, switches permit all VLANs across the trunk links. You can change this by specifying which VLANs can pass, as illustrated in the following output: Unlike Distance Vector routing protocols, which send their neighbors their entire routing table, Link State routing protocols send incremental updates when a change in the network topology is detected, which makes them more Configuring Sticky Secure MAC Addresses Physical Address. 0001.C7DD.CB19 You could also apply an access control list to the VTY lines and permit only SSH. We will cover access control lists on Day 15. Day 15 – IPv4 Access Lists In addition to DHCP server functionality, Cisco IOS routers also permit configuring the interfaces as DHCP clients. This means that interfaces will require an address using the standard DHCP process, and any server present on the specific subnet can allocate the IP addresses. Verifying the number of learned prefixes Verifying route metrics and next-hop information 3.6.cHost route We have covered some important ground over the last three days. Ensure you read over the notes again, making your own notes and highlighting important learning points which you will find makeup questions in the actual exam. The challenge labs throughout this book are based on previous labs already configured so we don’t provide solutions. Subnet Mask. : 255.255.0.0 tcp-small-servers Enable small TCP servers (e.g., ECHO) telnet-zeroidle Set TCP window 0 when connection is idle timestamps Timestamp debug/log messages Router0#show cdp Global CDP information: 4.3.cClient Standard numbered ACLs are the easiest to configure, so this is the best place to start. Standard ACLs can only filter based on a source network or IP address. C 172.16.0.0/16 is directly connected, FastEthernet0/0 R1#debug ip rip ? 3.4.aRouter on a stick Default routing isn’t limited to sending traffic to the Internet. Another popular way to leverage a default route is with enterprise networks. For example, if you have a core data center at your headquarters with two branch office sites, you could have all non-local branch office traffic forwarded to the core.

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