Term
| Describe the DHCP process for a PC entering the network. |
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Definition
1. PC sends a broadcast message looking for DHCP server.
2. Server sends unicast DHCP offer.
3. PC then requests the offered address by broadcast
4. Server sends unicast acknowledgement with address. |
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Term
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Definition
Client -UDP - 67
Server -UDP - 68 |
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Term
| What are the primary differences between BOOTP and DHCP? |
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Definition
BOOTP is statically mapped, Has permanent address assignment, limited parameters
DHCP dynamically mapped, uses leases and many parameters |
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Term
| What are the primary differences between BOOTP and DHCP? |
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Definition
BOOTP is statically mapped, Has permanent address assignment, limited parameters
DHCP dynamically mapped, uses leases and many parameters |
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Term
| DHCP and BOOTP use which ports? |
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Definition
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Term
| What are the primary differences between BOOTP and DHCP? |
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Definition
BOOTP is statically mapped, Has permanent address assignment, limited parameters
DHCP dynamically mapped, uses leases and many parameters |
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Term
| Command to exclude a range of addresses from DHCP. |
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Definition
| R1(config)# ip dhcp excluded-address 192.168.10.1 192.168.10.9 |
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Term
| Commands to create a DHCP pool. |
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Definition
R1(config)# ip dhcp pool LAN-POOL-1
R1(dhcp-config)# network xxxx xxxx
R1(dhcp-config)# default-router xxxx |
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Term
| Give four commands to check the status of DHCP on a cisco router. |
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Definition
R1# sho ip dhcp binding
R1# show ip dhcp server statistics
R1# show ip dhcp pool
R1# show ip dhcp conflict |
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Term
| What is the command to forward a broadcast message to other parts of the network? |
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Definition
It is configured on the interface or vlan which needs to forward the traffic.
R1(config-if)# ip helper-address 192.168.11.5 |
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Term
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Definition
| Cisco Router and Security Device Manager -- GUI for many Cisco router tasks |
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Term
| What happens when a cisco router detects an address conflict? |
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Definition
| The address is removed from the pool and is not reassigned until an administrator resolves the conflict. |
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Term
| In NAT table terms what do Inside Local, Inside Global, Outside global refer? |
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Definition
Inside local is the PC's address
Inside global is one of the companies external facing IP addresses.
Outside global is the address of the destination device. |
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Term
| Define dynamic NAT, static NAT and NAT overloading |
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Definition
Dynamic NAT --- pool of addresses first come first serve
Static NAT -- Each external address can be used by specific devices
NAT overloading (PAT) one external address is dynamically mapped based on a port number to an inside device |
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Term
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Definition
| Allows you to identify specific ports taht can be forwarded to inside hosts. |
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Term
| List two terms for NAT diagnostics. |
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Definition
R1# show ip nat translations
R1# show ip nat statistics |
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Term
| What does the clear ip nat translation command do and why use it? |
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Definition
| When troubleshooting NAT some entries may no longer be tied to active connections. The table keeps entries for 24 hours. Using the clear command will leave only active entries. |
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Term
| How big is an IPv6 address? |
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Definition
| 128bits --- 32 hexadecimal digits |
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Term
| What is the IPv6 loopback address? |
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Definition
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Term
| What is the recommended option to convert from IPv4 to IPv6? |
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Definition
| Dual stacking. Running both protocols side by side until you finally do not need the IPv4 capabilities. |
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