CCNA 1 V7 Modules 8-10: Study Set Exam
With Complete Solutions
Which information is used by routers to forward a data packet toward its
destination?
source IP address
destination IP address
source data-link address
destination data-link address - ANSWER Destination IP Address
A computer has to send a packet to a destination host in the same LAN.
How will the packet be sent?
The packet will be sent to the default gateway first, and then, depending on
the response from the gateway, it may be sent to the destination host.
The packet will be sent directly to the destination host.
The packet will first be sent to the default gateway, and then from the
default gateway it will be sent directly to the destination host.
The packet will be sent only to the default gateway. - ANSWER The packet
will be sent directly to the destination host.
,A router receives a packet from the Gigabit 0/0 interface and determines
that the packet needs to be forwarded out the Gigabit 0/1 interface. What
will the router do next?
route the packet out the Gigabit 0/1 interface
create a new Layer 2 Ethernet frame to be sent to the destination
look into the ARP cache to determine the destination IP address
look into the routing table to determine if the destination network is in the
routing table - ANSWER create a new Layer 2 Ethernet frame to be sent to
the destination
Which IPv4 address can a host use to ping the loopback interface?
126.0.0.1
127.0.0.0
126.0.0.0
127.0.0.1 - ANSWER 127.0.0.1
A computer can access devices on the same network but cannot access
devices on other networks. What is the probable cause of this problem?
The cable is not connected properly to the NIC.
The computer has an invalid IP address.
The computer has an incorrect subnet mask.
The computer has an invalid default gateway address. - ANSWER The
computer has an invalid default gateway address.
Which statement describes a feature of the IP protocol?
IP encapsulation is modified based on network media.
,IP relies on Layer 2 protocols for transmission error control.
MAC addresses are used during the IP packet encapsulation.
IP relies on upper layer services to handle situations of missing or out-of-
order packets. - ANSWER IP relies on upper layer services to handle
situations of missing or out-of-order packets.
Explanation: IP protocol is a connection-less protocol, considered
unreliable in terms of end-to-end delivery. It does not provide error control
in the cases where receiving packets are out-of-order or in cases of
missing packets. It relies on upper layer services, such as TCP, to resolve
these issues.
Why is NAT not needed in IPv6?
Because IPv6 has integrated security, there is no need to hide the IPv6
addresses of internal networks.
Any host or user can get a public IPv6 network address because the
number of available IPv6 addresses is extremely large.
The problems that are induced by NAT applications are solved because the
IPv6 header improves packet handling by intermediate routers.
The end-to-end connectivity problems that are caused by NAT are solved
because the number o - ANSWER Any host or user can get a public IPv6
network address because the number of available IPv6 addresses is
extremely large.
Explanation: The large number of public IPv6 addresses eliminates the
need for NAT. Sites from the largest enterprises to single households can
get public IPv6 network addresses. This avoids some of the NAT-induced
application problems that are experienced by applications that require end-
to-end connectivity.
Which parameter does the router use to choose the path to the destination
when there are multiple routes available?
the lower metric value that is associated with the destination network
, the lower gateway IP address to get to the destination network
the higher metric value that is associated with the destination network
the higher gateway IP address to get to the destination network - ANSWER
the lower metric value that is associated with the destination network
9. What are two services provided by the OSI network layer? (Choose two.)
performing error detection
routing packets toward the destination
encapsulating PDUs from the transport layer
placement of frames on the media
collision detection - ANSWER encapsulating PDUs from the transport layer
routing packets toward the destination
Explanation: The OSI network layer provides several services to allow
communication between devices:
addressing
encapsulation
routing
de-encapsulation
Error detection, placing frames on the media, and collision detection are all
functions of the data ink layer.
Within a production network, what is the purpose of configuring a switch
with a default gateway address?
Hosts that are connected to the switch can use the switch default gateway
address to forward packets to a remote destination.
A switch must have a default gateway to be accessible by Telnet and SSH.
With Complete Solutions
Which information is used by routers to forward a data packet toward its
destination?
source IP address
destination IP address
source data-link address
destination data-link address - ANSWER Destination IP Address
A computer has to send a packet to a destination host in the same LAN.
How will the packet be sent?
The packet will be sent to the default gateway first, and then, depending on
the response from the gateway, it may be sent to the destination host.
The packet will be sent directly to the destination host.
The packet will first be sent to the default gateway, and then from the
default gateway it will be sent directly to the destination host.
The packet will be sent only to the default gateway. - ANSWER The packet
will be sent directly to the destination host.
,A router receives a packet from the Gigabit 0/0 interface and determines
that the packet needs to be forwarded out the Gigabit 0/1 interface. What
will the router do next?
route the packet out the Gigabit 0/1 interface
create a new Layer 2 Ethernet frame to be sent to the destination
look into the ARP cache to determine the destination IP address
look into the routing table to determine if the destination network is in the
routing table - ANSWER create a new Layer 2 Ethernet frame to be sent to
the destination
Which IPv4 address can a host use to ping the loopback interface?
126.0.0.1
127.0.0.0
126.0.0.0
127.0.0.1 - ANSWER 127.0.0.1
A computer can access devices on the same network but cannot access
devices on other networks. What is the probable cause of this problem?
The cable is not connected properly to the NIC.
The computer has an invalid IP address.
The computer has an incorrect subnet mask.
The computer has an invalid default gateway address. - ANSWER The
computer has an invalid default gateway address.
Which statement describes a feature of the IP protocol?
IP encapsulation is modified based on network media.
,IP relies on Layer 2 protocols for transmission error control.
MAC addresses are used during the IP packet encapsulation.
IP relies on upper layer services to handle situations of missing or out-of-
order packets. - ANSWER IP relies on upper layer services to handle
situations of missing or out-of-order packets.
Explanation: IP protocol is a connection-less protocol, considered
unreliable in terms of end-to-end delivery. It does not provide error control
in the cases where receiving packets are out-of-order or in cases of
missing packets. It relies on upper layer services, such as TCP, to resolve
these issues.
Why is NAT not needed in IPv6?
Because IPv6 has integrated security, there is no need to hide the IPv6
addresses of internal networks.
Any host or user can get a public IPv6 network address because the
number of available IPv6 addresses is extremely large.
The problems that are induced by NAT applications are solved because the
IPv6 header improves packet handling by intermediate routers.
The end-to-end connectivity problems that are caused by NAT are solved
because the number o - ANSWER Any host or user can get a public IPv6
network address because the number of available IPv6 addresses is
extremely large.
Explanation: The large number of public IPv6 addresses eliminates the
need for NAT. Sites from the largest enterprises to single households can
get public IPv6 network addresses. This avoids some of the NAT-induced
application problems that are experienced by applications that require end-
to-end connectivity.
Which parameter does the router use to choose the path to the destination
when there are multiple routes available?
the lower metric value that is associated with the destination network
, the lower gateway IP address to get to the destination network
the higher metric value that is associated with the destination network
the higher gateway IP address to get to the destination network - ANSWER
the lower metric value that is associated with the destination network
9. What are two services provided by the OSI network layer? (Choose two.)
performing error detection
routing packets toward the destination
encapsulating PDUs from the transport layer
placement of frames on the media
collision detection - ANSWER encapsulating PDUs from the transport layer
routing packets toward the destination
Explanation: The OSI network layer provides several services to allow
communication between devices:
addressing
encapsulation
routing
de-encapsulation
Error detection, placing frames on the media, and collision detection are all
functions of the data ink layer.
Within a production network, what is the purpose of configuring a switch
with a default gateway address?
Hosts that are connected to the switch can use the switch default gateway
address to forward packets to a remote destination.
A switch must have a default gateway to be accessible by Telnet and SSH.
