CCNA OBJ. 1.0 NETWORK FUNDAMENTALS
What is the maximum bandwidth of a T1 point-to-point connection?
1.544 Mbps
Which network allows devices to communicate without the need to access the Internet?
172.28.0.0/16
An engineer observes high usage on the 2.4GHz channels and lower usage on the 5GHz channels. What must be configured to allow clients to preferentially use5GHz access points?
Client Band Select
Which two goals reasons to implement private IPv4 addressing on your network? (Choose two.)
Conserve IPv4 address; Reduce the risk of a network security breach
Under which condition is TCP preferred over UDP?
TCP is used when data reliability is critical, and UDP is used when missing packets are acceptable.
What is the difference in data transmission delivery and reliability between TCP and UDP?
TCP requires the connection to be established before transmitting data. UDP transmits data at a higher rate without ensuring packet delivery.
How do TCP and UDP differ in the way they guarantee packet delivery?
TCP uses checksum, acknowledgements, and retransmissions, and UDP uses checksums only
How do TCP and UDP differ in the way that they establish a connection between two endpoints?
TCP uses the three-way handshake, and UDP does not guarantee message delivery.
Which technique can you use to route IPv6 traffic over an IPv4 infrastructure?
6 to 4 tunneling
Which function does the range of private IPv4 addresses perform?
allows multiple companies to each use the same addresses without conflicts
Which WAN access technology is preferred for a small office / home office architecture?
broadband cable access
What is a recommended approach to avoid co-channel congestion while installing access points that use the 2.4 GHz frequency?
different nonoverlapping channels
A wireless administrator has configured a WLAN; however, the clients need access to a less congested 5-GHz network for their voice quality. Which action must be taken to meet the requirement?
enable Band Select
Which action must be taken to assign a global unicast IPv6 address on an interface that is derived from the MAC address of that interface?
enable SLAAC on an interface
Which function is performed by the collapsed core layer in a two-tier architecture?
enforcing routing policies
What is the destination MAC address of a broadcast frame?
ff:ff:ff:ff:ff:ff
An engineer must configure a /30 subnet between two routes. Which usable IP address and subnet mask combination meets this criteria?
interface e0/0 description to XX-AXXX:XXXXX ip address 209.165.201.2 225.255.255.252
A device detects two stations transmitting frames at the same time. This condition occurs after the first 64 bytes of the frame is received. Which interface counter increments?
late collision
Which 802.11 frame type is Association Response?
management
Which 802.11 frame type is indicated by a probe response after a client sends a probe request?
management
What are two functions of a Layer 2 switch? (Choose two.)
moves packets within a VLAN; makes forwarding decisions based on the MAC address of a packet
Which component of an Ethernet frame is used to notify a host that traffic is coming?
preamble
A manager asks a network engineer to advise which cloud service models are used so employees do not have to waste their time installing, managing, and updating software that is only used occasionally. Which cloud service model does the engineer recommend?
software-as-a-service
What is the primary function of a Layer 3 device?
to pass traffic between different networks
For what two purposes does the Ethernet protocol use physical addresses?
to uniquely identify devices at Layer 2; to allow communication between different devices on the same network
What are two reasons that cause late collisions to increment on an Ethernet interface? (Choose two.)
when one side of the connection is configured for half-duplex; when the cable length limits are exceeded
What is the difference regarding reliability and communication type between TCP and UDP?
TCP is reliable and is a connection-oriented protocol; UDP is not reliable and is a connectionless protocol.
What is the expected outcome when an EUI-64 address is generated?
The seventh bit of the original MAC address of the interface is inverted
Which two WAN architecture options help a business scalability and reliability for the network? (Choose two.)
asychronous routing; dual-homed branches
Which network action occurs within the data plane?
compare the destination IP address to the IP routing table
What is a role of access points in an enterprise network?
connect wireless devices to a wired network
Which type of IPv6 address is publicly routable in the same way as IPv4 public addresses?
global unicast
An office has 8 floors with approximately 30-40 users per floor. One subnet must be used. Which command must be configured on the router Switched VirtualInterface to use address space efficiently?
ip address 192.168.0.0 255.255.254.0
Which command automatically generates an IPv6 address from a specified IPv6 prefix and MAC address of an interface?
ipv6 address autoconfig
What is a characteristic of cloud-based network topology?
services are provided by a public, private, or hybrid deployment
Which two options are the best reasons to use an IPV4 private IP space? (Choose two.)
to enable intra-enterprise communication; to conserve global address space
Which IPv6 address type provides communication between subnets and cannot route on the Internet?
unique local
In which way does a spine-and-leaf architecture allow for scalability in a network when additional access ports are required?
A leaf switch can be added with connections to every spine switch.
What are two similarities between UTP Cat 5e and Cat 6a cabling? (Choose two.)
Both support speeds of at least 1 Gigabit; Both support runs of up to 100 meters.
Which two statements about the purpose of the OSI model are accurate? (Choose two.)
Defines the network functions that occur at each layer; Facilitates an understanding of how information travels throughout a network
What is a characteristic of spine-and-leaf architecture?
Each device is separated by the same number of hops.
Which IPv6 address block forwards packets to a multicast address rather than a unicast address?
FF00::/12
Which IPv6 address block sends packets to a group address rather than a single address?
FF00::/8
When configuring IPv6 on an interface, which two IPv6 multicast groups are joined? (Choose two.)
FF02::1 ; FF02::2
What occurs to frames during the process of frame flooding?
Frames are sent to every port on the switch in the same VLAN except from the originating port.
Which action is taken by switch port enabled for PoE power classification override?
If a monitored port exceeds the maximum administrative value for power, the port is shutdown and err-disabled.
How does a Cisco Unified Wireless Network respond to Wi-Fi channel overlap?
It alternates automatically between 2.4 GHz and 5 GHz on adjacent access points.
What is a benefit of using a Cisco Wireless LAN Controller?
It eliminates the need to configure each access point individually.
Which two statements are true about the command ip route 172.16.3.0 255.255.255.0 192.168.2.4? (Choose two.)
It establishes a static route to the 172.16.3.0 network; It uses the default administrative distance.
Which two functions are performed by the core layer in a three-tier architecture? (Choose two.)
Provide uninterrupted forwarding service; Ensure timely data transfer between layers
How do TCP and UDP differ in the way they provide reliability for delivery of packets?
TCP provides flow control to avoid overwhelming a receiver by sending too many packets at once, UDP sends packets to the receiver in a continuous stream without checking.
What is the default behavior of a Layer 2 switch when a frame with an unknown destination MAC address is received?
The Layer 2 switch floods packets to all ports except the receiving port in the given VLAN.
How does CAPWAP communicate between an access point in local mode and a WLC?
The access point has the ability to link to any switch in the network, assuming connectivity to the WLC
What are two descriptions of three-tier network topologies? (Choose two.)
The distribution layer runs Layer 2 and Layer 3 technologies; The network core is designed to maintain continuous connectivity when devices fail
What are two differences between optical-fiber cabling and copper cabling? (Choose two.)
The glass core component is encased in a cladding; Light is transmitted through the core of the fiber
In which situation is private IPv4 addressing appropriate for a new subnet on the network of an organization?
There is limited unique address space, and traffic on the new subnet will stay local within the organization.
What is the same for both copper and fiber interfaces when using SFP modules?
They provide minimal interruption to services by being hot-swappable
Which three statements about MAC addresses are correct? (Choose three.)
To communicate with other devices on a network, a network device must have a unique MAC address; A MAC address contains two main components, the first of which identifies the manufacturer of the hardware and the second of which uniquely identifies the hardware; An example of a MAC address is 0A:26:B8:D6:65:90
What is a network appliance that checks the state of a packet to determine whether the packet is legitimate?
firewall
Which networking function occurs on the data plane?
forwarding remote client/server traffic
What are two functions of a server on a network? (Choose two.)
handles requests from multiple workstations at the same time; runs applications that send and retrieve data for workstations that make requests
An implementer is preparing hardware for virtualization to create virtual machines on a host. What is needed to provide communication between hardware and virtual machines?
hypervisor
A frame that enters a switch fails the Frame Check Sequence. Which two interface counters are incremented? (Choose two.)
input errors; CRC
You are configuring your edge routers interface with a public IP address for Internet connectivity. The router needs to obtain the IP address from the service provider dynamically.Which command is needed on interface FastEthernet 0/0 to accomplish this?
ip address dynamic
A network engineer must configure the router R1 GigabitEthernet1/1 interface to connect to the router R2 GigabitEthernet1/1 interface. For the configuration to be applied, the engineer must compress the address 2001:0db8:0000:0000:0500:000a:400F:583B. Which command must be issued on the interface?
ipv6 address 2001:db8::500:a:400F:583B
What are two benefits of private IPv4 IP addresses? (Choose two.)
They are less costly than public IP addresses; They can be assigned to devices without Internet connections.
What are two benefits that the UDP protocol provide for application traffic? (Choose two.)
UDP traffic has lower overhead than TCP traffic; The application can use checksums to verify the integrity of application data
What identifies the functionality of virtual machines?
The hypervisor virtualizes physical components including CPU, memory, and storage.
Using direct sequence spread spectrum, which three 2.4-GHz channels are used to limit collisions?
1, 6, 11
What is the binary pattern of unique ipv6 unique local address?
11111100
Several new coverage cells are required to improve the Wi-Fi network of an organization. Which two standard designs are recommended? (Choose two.)
Cells that overlap one another are configured to use nonoverlapping channels.; For maximum throughput, the WLC is configured to dynamically set adjacent access points to the channel.
