2026 CCNAv7 Modules 1 – 3: Basic Network Connectivity and
Communications Exam
A computer can access devices on the same network but cannot access devices on
other networks. What is the probable cause of this problem?
1. The computer has an invalid default gateway address.
2. The cable is not connected properly to the NIC.
3. The computer has an invalid IP address.
4. The computer has an incorrect subnet mask.
Which statement describes a feature of the IP protocol?
1. IP relies on upper layer services to handle situations of missing or out-of-order
packets.
2. IP encapsulation is modified based on network media.
3. IP relies on Layer 2 protocols for transmission error control.
4. MAC addresses are used during the IP packet encapsulation.
Why is NAT not needed in IPv6?
1. Any host or user can get a public IPv6 network address because the number of
available IPv6 addresses is extremely large.
2. Because IPv6 has integrated security, there is no need to hide the IPv6 addresses of
internal networks.
3. The problems that are induced by NAT applications are solved because the IPv6 header
improves packet handling by intermediate routers.
4. The end-to-end connectivity problems that are caused by NAT are solved because the
number of routes increases with the number of nodes that are connected to the Internet.
1/32
, Which parameter does the router use to choose the path to the destination when
there are multiple routes available?
1. the lower metric value that is associated with the destination network
2. the lower gateway IP address to get to the destination network
3. the higher metric value that is associated with the destination network
4. the higher gateway IP address to get to the destination network
What are two services provided by the OSI network layer?
1. routing packets toward the destination
2. encapsulating PDUs from the transport layer
3. performing error detection
4. placement of frames on the media
5. collision detection
Within a production network, what is the purpose of configuring a switch with a
default gateway address?
1. The default gateway address is used to forward packets originating from the switch
to remote networks.
2. Hosts that are connected to the switch can use the switch default gateway address to
forward packets to a remote destination.
3. A switch must have a default gateway to be accessible by Telnet and SSH.
4. It provides a next-hop address for all traffic that flows through the switch.
What is a basic characteristic of the IP protocol?
1. connectionless
2. media dependent
3. user data segmentation
4. reliable end-to-end delivery
Which field in the IPv4 header is used to prevent a packet from traversing a
network endlessly?
1. Time-to-Live
2/32
,2. Sequence Number
3. Acknowledgment Number
4. Differentiated Services
What is one advantage that the IPv6 simplified header offers over IPv4?
1. efficient packet handling
2. smaller-sized header
3. little requirement for processing checksums
4. smaller-sized source and destination IP addresses
What IPv4 header field identifies the upper layer protocol carried in the packet?
1. Protocol
2. Identification
3. Version
4. Differentiated Services
3/32
, 1.
4/32
Communications Exam
A computer can access devices on the same network but cannot access devices on
other networks. What is the probable cause of this problem?
1. The computer has an invalid default gateway address.
2. The cable is not connected properly to the NIC.
3. The computer has an invalid IP address.
4. The computer has an incorrect subnet mask.
Which statement describes a feature of the IP protocol?
1. IP relies on upper layer services to handle situations of missing or out-of-order
packets.
2. IP encapsulation is modified based on network media.
3. IP relies on Layer 2 protocols for transmission error control.
4. MAC addresses are used during the IP packet encapsulation.
Why is NAT not needed in IPv6?
1. Any host or user can get a public IPv6 network address because the number of
available IPv6 addresses is extremely large.
2. Because IPv6 has integrated security, there is no need to hide the IPv6 addresses of
internal networks.
3. The problems that are induced by NAT applications are solved because the IPv6 header
improves packet handling by intermediate routers.
4. The end-to-end connectivity problems that are caused by NAT are solved because the
number of routes increases with the number of nodes that are connected to the Internet.
1/32
, Which parameter does the router use to choose the path to the destination when
there are multiple routes available?
1. the lower metric value that is associated with the destination network
2. the lower gateway IP address to get to the destination network
3. the higher metric value that is associated with the destination network
4. the higher gateway IP address to get to the destination network
What are two services provided by the OSI network layer?
1. routing packets toward the destination
2. encapsulating PDUs from the transport layer
3. performing error detection
4. placement of frames on the media
5. collision detection
Within a production network, what is the purpose of configuring a switch with a
default gateway address?
1. The default gateway address is used to forward packets originating from the switch
to remote networks.
2. Hosts that are connected to the switch can use the switch default gateway address to
forward packets to a remote destination.
3. A switch must have a default gateway to be accessible by Telnet and SSH.
4. It provides a next-hop address for all traffic that flows through the switch.
What is a basic characteristic of the IP protocol?
1. connectionless
2. media dependent
3. user data segmentation
4. reliable end-to-end delivery
Which field in the IPv4 header is used to prevent a packet from traversing a
network endlessly?
1. Time-to-Live
2/32
,2. Sequence Number
3. Acknowledgment Number
4. Differentiated Services
What is one advantage that the IPv6 simplified header offers over IPv4?
1. efficient packet handling
2. smaller-sized header
3. little requirement for processing checksums
4. smaller-sized source and destination IP addresses
What IPv4 header field identifies the upper layer protocol carried in the packet?
1. Protocol
2. Identification
3. Version
4. Differentiated Services
3/32
, 1.
4/32
