How does a router decide where the
contents of a received frame should be
forwarded?
by matching destination
IP addresses with networks in the routing table
by matching the
destination IP address with IP addresses listed in the
ARP table
by matching the
destination MAC address with MAC addresses listed in the
CAM table
by forwarding the frame
to all interfaces except the interface on which the
frame was received
2
Why is IP considered a best-effort
protocol?
IP detects lost
packets.
IP validates the
content of the packets.
IP does not provide
acknowledgment of the data delivery.
IP reorders the packet
as they arrive at the destination
host.
3
Refer to the exhibit. The small office
LAN shown in the exhibit may eventually be connected to
the Internet. According to Cisco best practice, which IP
network addresses should be used?
12.0.0.0
172.0.0.0
172.168.0.0
192.32.17.0
192.168.67.0
225.1.5.0
4
Refer to the exhibit. A newly hired
technician is testing the connectivity of all hosts by
issuing a ping command. The technician notices
that a default gateway is not configured on all the
hosts, but all hosts have connectivity between hosts, a
fact which seems to confuse the technician. How would
you explain the connectivity to the
technician?
The hosts are detecting
the default gateway configured on the hub.
The hosts are all in
one LAN, so default gateway information is not
needed.
The hosts in the
network only require that one host has a gateway
configured.
The hosts in the
network would only need a gateway if a switch replaces
the hub.
The hosts are using
broadcast to reach each other since no gateway is
configured.
5
Given a host with the IP address
172.32.65.13 and a default subnet mask, to which network
does the host belong?
172.32.65.0
172.32.65.32
172.32.0.0
172.32.32.0
6
What is the purpose of a DHCP server on a
network?
to resolve MAC
addresses to IP addresses
to resolve IP addresses
to MAC addresses
to resolve host names
to IP addresses
to assign IP addresses
dynamically to hosts
to assign a MAC address
to a host
7
Refer to the exhibit. A technician is
planning an addressing scheme for a branch office as
shown in the exhibit. What is the status of the intended
network?
The configuration will
work as planned.
The subnetwork mask of
host A is incorrect.
The default gateway of
host A is a network address.
The addresses on the
router LAN interfaces are on the same subnetwork.
The IP address of host
A is on a different subnetwork than the subnetwork that
the Ethernet router interface is on.
8
Refer to the exhibit. Which devices
are recommended to have the IP addresses manually
configured?
PC1 and PC2
all servers
only PC2 Laptop
all hosts and all
servers
9
What header address information does a
router change in the information it receives from an
attached Ethernet interface before information is
transmitted out another interface?
only the Layer 2 source
address
only the Layer 2
destination address
only the Layer 3 source
address
only the Layer 3
destination address
the Layer 2 source and
destination address
the Layer 3 source and
destination address
10
A company is using a Class B IP addressing
scheme and expects to need as many as 100 networks. What
is the correct subnet mask to use with the network
configuration?
255.255.0.0
255.255.240.0
255.255.254.0
255.255.255.0
255.255.255.128
255.255.255.192
11
Refer to the exhibit. Based on the
information shown, which two statements are true?
(Choose two.)
An ARP request must be
used to obtain an address that is placed in the ARP
table.
Frames from other hosts
in the network to this host will use a destination
address of 00-06-25-25-6e-5d.
The only remote
locations that can be reached from this host are
192.168.1.97 and 192.168.1.254.
If a packet is sent to
a network device other than 192.168.1.97 and
192.168.1.254, an ARP request must be used.
If the computer with
the IP address of 192.168.1.94 sends a packet to the
device with the IP address 192.168.1.97, no ARP request
is required.
12
Refer to the exhibit. Host A pings
host B. When R4 accepts the ping into the Ethernet
interface, what two pieces of header information are
included? (Choose two.)
source IP address:
192.168.10.129
source IP address:
BBBB.3333.5677
source MAC address:
5555.AAAA.6666
destination IP address:
192.168.10.33
destination IP address:
192.168.10.134
destination MAC
address: 9999.DADC.1234
13
Which TCP/IP model layer supports both LAN
and WAN technologies?
network access
layer
internet layer
transport layer
application
layer
14
Host A is connected to the LAN, but it
cannot connect to the Internet. The host configuration
is shown in the exhibit. What are the two problems with
this configuration? (Choose two.)
The host subnet mask is
incorrect.
The host is not
configured for subnetting.
The default gateway is
a network address.
The default gateway is
on a different network than the host.
The host IP address is
on a different network from the Serial interface of the
router.
15
An IP network address has been subnetted
so that every subnetwork has 14 usable host IP
addresses. What is the appropriate subnet mask for the
newly created subnetworks?
255.255.255.128
255.255.255.224
255.255.255.240
255.255.255.248
255.255.255.252
16
What is the primary responsibility of the
transport layer?
allows access to the
network media
provides data
representation and encoding
selects paths through
the network for data to travel
defines end-to-end
connectivity between host
applications
17
Refer to the exhibit. The network
administrator has assigned the internetwork of LBMISS an
address range of 192.168.10.0. This address range has
been subnetted using a /29 mask. In order to accommodate
a new building, the technician has decided to use the
fifth subnet for configuring the new network (subnet
zero is the first subnet). By company policies, the
router interface is always assigned the first usable
host address and the workgroup server is given the last
usable host address. Which configuration should be
entered into the workgroup server's properties to allow
connectivity to the network?
IP address:
192.168.10.38 subnet mask: 255.255.255.240 default
gateway: 192.168.10.39
IP address:
192.168.10.38 subnet mask: 255.255.255.240 default
gateway: 192.168.10.33
IP address:
192.168.10.38 subnet mask: 255.255.255.248 default
gateway: 192.168.10.33
IP address:
192.168.10.39 subnet mask: 255.255.255.248 default
gateway: 192.168.10.31
IP address:
192.168.10.254 subnet mask: 255.255.255.0 default
gateway: 192.168.10.1
18
Which subnet mask would be assigned to the
network address of 192.168.32.0 to provide 254 useable
host addresses per subnetwork?
255.255.0.0
255.255.255.0
255.255.254.0
255.255.248.0
19
Refer to the exhibit. After host 2 is
connected to the switch on the LAN, host 2 is unable to
communicate with host 1. What is the cause of this
problem?
The subnet mask of host
2 is incorrect.
Host 1 and host 2 are
on different networks.
The switch needs an IP
address that is not configured.
The router LAN
interface and host 1 are on different networks.
The IP address of host
1 is on a different network than is the LAN interface of
the router.
20
Which three addresses are considered to be
private addresses? (Choose three.)
10.45.09.23
15.87.234.87
172.32.45.90
172.17.78.98
192.169.89.56
192.168.45.23
21
Which type of routing allows routers to
adapt to network changes?
static routes
dynamic routing
only default
routes
No routing is
necessary.
22
Refer to the exhibit. Which two
statements are correct in reference to the output shown?
(Choose two.)
The LAN segment is
subnetted to allow 254 subnets.
The DNS server for this
host is on the same subnet as the host.
The host automatically
obtained the IP addresses 192.168.1.100.
The host received the
IP address from a DHCP-enabled device on the local LAN
segment.
The host is assigned an
address of 00-50-8D-F1-EA-8D by the
administrator.
23
What do switches and routers use to make
forwarding decisions?
Switches and routers
both use IP addresses.
Switches and routers
use both MAC and IP addresses.
Switches use IP
addresses. Routers use MAC addresses.
Switches use MAC
addresses. Routers use IP addresses.
Switches use MAC and IP
addresses. Routers use IP
addresses.
24
Refer to the exhibit. A network
administrator is planning the addressing scheme for the
LAN using 172.25.14.0/26. The hosts are to be assigned
addresses 172.25.14.1 จC 172.25.14.25. The LAN interface
of the router is to be configured using 172.25.14.63 as
the IP address. What would describe this addressing
scheme?
The LAN is being
addressed properly.
The subnet that is
being assigned is not a usable subnet address.
The router LAN
interface is being assigned a broadcast address.
The subnet mask does
not allow enough host addresses in a single
subnet.
25
Which two statements correctly describe
the IP address 127.0.0.1? (Choose two.)
