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Configuration Basics

router configuration commands

QuestionAnswer
what are the three set up mode options 1. command-Line interface, 2. basic management, and 3. extended setup
What protocol does the Ping command use? ICMP echo messages
How does the Ping differ from traceroute? Ping uses ICMP echo messages to varify that the specified device is recieving L3 packets (5) traceroute uses TTL values from each router it meets to send bak a list of hops along the way
What are three DHCP show commands? show ip dhcp binding -displays the ip addresses currently leased; show ip dhcp pool - displays the ip pools, currently leased addresses statistics, watermark ; show ip dhcp statistics - displays dhcp stats
What command configures the DHCP server's address on a relay router or interface? ip helper-address <server-ip>
When DHCP is set up correctly what can a client automatically learn? 1. its host IP address 2. the subnet mask 3. default router 4. DNS servers
What are the steps to configure a DHCP server? step 1: (config)#ip dhcp exclude-address <first IP> <last ip> step 2: (config)#ip dhcp pool name a. ( )#network <ip & mask> b.()#default-router <ip1> <ip2>... c.()#dns-server <ip1> <ip2>... d.()#lease <days><hours><min> e.()#domain-name <name>
In a Discover DHCP message from the client what is the source and destination address of the packet? Source: 0.0.0.0 b/c the client does not have an address yet Destination: 255.255.255.255 because the client does not have the default router info yet
In the Discover DHCP message from the relay agent what is the source and destination address? Source: Relay agent ip address; Desintation: the DCHP server address
In the offer message from the DHCP server what is the source and destination address of the packet? Source: DHCP server address; Dest: Relay Agent
How does the DHCP server know what ip pool to use? it uses the source address in the discover message and compares it to the address configured in the network command
In the offer message from the Relay agent what is the source and destination address of the packet? source: dhcp server; destination: 255.255.255.255
What happens if the discover source address is not in any of the ranges on the DHCP server? then the server cannot lease any addresses to that network (no reply)
What could cause hosts to have issues resolving hostnames to IP addresses? Inccorrect or missing DNS server addresses configured on the DHCP server
what could cause hosts to fail pinging (sending packets) to hosts on other subnets? incorrect or missing default router configuration on the DHCP server
what command allows interfaces on a network to use the zero subnet? (config)#ip subnet zero
Created by: carly.files
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