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121.
An enterprise puts the DHCP and DNS servers on VLAN 10/subnet 10 in Atlanta, using IP address 10.1.10.1 for the DHCP server and 10.1.10.2 for the DNS server. A remote router sits in Boston, with devices on the Boston LAN using the DHCP and DNS servers in Atlanta. Which of the following needs to be configured in the routers in this enterprise to support DHCP and DNS?
- A.The ip helper-address 10.1.10.1 command in the Atlanta router
- B.The ip helper-address 10.1.10.2 command in the Boston router
- C.The ip name-server 10.1.10.2 command in the Atlanta router
- D.The ip dhcp-server 10.1.10.1 command in the Boston router
- E.None of the other answers are correct.
- Answer & Explanation
- Report
Answer : [E]
Explanation :
Explanation :
122.
Fred decides to migrate from an old DHCP server platform to use a Cisco router at the headquarters building. This DHCP server, created with configuration in IOS on a Cisco router, supports 200 remote subnets. Which of the following settings are made outside of a per-subnet pool of addresses?
- A.Client IP address
- B.Addresses in that subnet excluded from being leased by the server
- C.Default router
- D.DNS server
- D.Length of address lease
- Answer & Explanation
- Report
Answer : [B]
Explanation :
Explanation :
123.
PC1, a new PC, just booted for the first time when connected to an enterprise network. PC1 used DHCP to lease IP address 10.1.1.1, learning mask 255.255.255.0, DNS server 10.9.9.9, and default gateway 10.1.1.2, with a lease time of 7 days. Assume that the PC has sent nothing else over the network because the DHCP process completed. The user then opens a web browser and types www.ciscopress.com. Which of the following actions happens next?
- A.PC1 sends an ARP request to find the web server’s MAC address.
- B.PC1 sends an ARP request to find the default gateway’s (10.1.1.2) MAC address.
- C.PC1 sends a DNS request about www.ciscopress.com to the DNS server (10.9.9.9).
- D.PC1 sends an IP packet to the www.ciscopress.com web server IP address.
- Answer & Explanation
- Report
Answer : [B]
Explanation :
Explanation :
124.
A packet is sent to a destination address. That single packet is routed through the network to the final router, which then sends the packet to all hosts connected to that one subnet. Which of the following IP address types was used as the destination IP address?
- A.A unicast address
- B.A network broadcast address
- C.A subnet broadcast address
- D.A multicast address
- Answer & Explanation
- Report
Answer : [C]
Explanation :
Explanation :
125.
A packet is sent to a destination address. That single packet is replicated by a few routers based on the routers’ knowledge of hosts that had earlier registered to receive packets sent to that destination address. The routers do not forward copies of the packet onto subnets where no hosts have registered, and do forward copies of the packet onto subnets where at least one host has registered to receive those packets. Which of the following IP address types was used as the destination IP address?
- A.A unicast address
- B.A network broadcast address
- C.A subnet broadcast address
- D.A multicast address
- Answer & Explanation
- Report
Answer : [D]
Explanation :
Explanation :
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