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16.
You are configuring a default route that should direct traffic for unknown networks
out of interface Fa 0/0 to a next-hop IP address of 192.168.1.100. Which of the following
commands should you use to configure the default route?
- A.ip route 255.255.255.255 255.255.255.255 fa 0/0
- B.ip route 255.255.255.255 255.255.255.255 192.168.1.100
- C.ip route 0.0.0.0 0.0.0.0 fa 0/0
- D.ip route 0.0.0.0 0.0.0.0 192.168.1.100
- Answer & Explanation
- Report
Answer : [D]
Explanation :
Explanation :
| A default route is specified with an IP address/mask combination of 0.0.0.0 0.0.0.0 . As a best practice, you should point a default route to a next-hop IP address, rather than an Ethernet interface, because specifying an Ethernet interface can generate an excessive number of ARP requests and hurt router performance. |
17.
Interface Fa 0/0 on your router has obtained an IP address through DHCP. You notice
that in addition to an IP address assigned to interface Fa 0/0, your router now has
a default static route configured. What command can you issue to prevent a router
from automatically installing a default static route based on default gateway information
learned through DHCP?
- A.no ip dhcp client request router
- B.ip dhcp suppress gateway
- C.ip dhcp route local
- D.no ip dhcp server response router
- Answer & Explanation
- Report
Answer : [A]
Explanation :
Explanation :
| The no ip dhcp client request router command can be used to prevent a router from automatically installing a static default route based on default gateway information learned from a DHCP server. None of the other options are valid commands. |
18.
Which of the following answers list either a protocol or function that can be used by
a host to dynamically learn its own IPv6 address? (Choose two.)
- A.Stateful DHCP
- B.Stateless DHCP
- C.Stateless autoconfiguration
- D.Neighbor Discovery Protocol
- Answer & Explanation
- Report
Answer : [A],[C]
Explanation :
Explanation :
| IPv6 supports stateful DHCP, which works similarly to IPv4’s DHCP to dynamically assign the entire IP address. Stateless autoconfiguration also allows for the assignment by finding the prefix from some nearby router and calculating the Interface ID using the EUI-64 format. Stateless DHCP simply supplies the DNS server IP addresses, and NDP supplies Layer 2 mapping information. |
19.
Which of the following is helpful to allow an IPv6 host to learn the IP address of a
default gateway on its subnet?
- A.Stateful DHCP
- B.Stateless RS
- C.Stateless autoconfiguration
- D.Neighbor Discovery Protocol
- Answer & Explanation
- Report
Answer : [D]
Explanation :
Explanation :
| Stateless autoconfiguration only helps a host learn and form its own IP address, but it does not help the host learn a default gateway. Stateless RS is not a valid term or feature. Neighbor Discovery Protocol (NDP) is used for several purposes, including the same purpose as ARP in IPv4, plus to learn configuration parameters such as a default gateway IP address. |
20.
Which of the following answers lists a multicast IPv6 address?
- A.2000::1:1234:5678:9ABC
- B.FD80::1:1234:5678:9ABC
- C.FE80::1:1234:5678:9ABC
- D.FF80::1:1234:5678:9ABC
- Answer & Explanation
- Report
Answer : [D]
Explanation :
Explanation :
| Global unicast addresses begin with 2000::/3, meaning that the first 3 bits match the value in hex 2000. Similarly, unique local addresses match FD00::/8, and linklocal addresses match FE80::/10 (values that begin with FE8, FE9, FEA, and FEB hex). Multicast IPv6 addresses begin FF00::/8, meaning that the first two hex digits are F. |
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