1000 CCNA QUESTIONS .1A QUESTIONS AND ANSWERS GRADED A+
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CCNA - Cisco Certified Network Associate
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CCNA - Cisco Certified Network Associate
1000 CCNA QUESTIONS .1A QUESTIONS AND ANSWERS GRADED A+A frame that enters a switch fails the Frame Check Sequence. Which two interface counters are incremented? (Choose two.)
A. input errors B. frame C. giants D. CRC E. runts - answerCorrect Answer: AD
Whenever the physical transmission has p...
1000 CCNA QUESTIONS .1A QUESTIONS
AND ANSWERS GRADED A+
A frame that enters a switch fails the Frame Check Sequence. Which two interface counters are incremented? (Choose two.) A. input errors B. frame C. giants D. CRC E. runts - answerCorrect Answer: AD
Whenever the physical transmission has problems, the receiving device might receive a
frame whose bits have changed values. These frames do not pass the error detection logic as implemented in the FCS field in the Ethernet trailer. The receiving device discards the frame and counts it as some kind of input error. Cisco switches list this error as a CRC error. Cyclic redundancy check (CRC) is a term related to how the FCS math detects an error. input errors includes runts, giants, no buffer, CRC, frame, overrun, and ignored The counts. show interface s0/0/0 The output below show the interface counters with the command:
How do TCP and UDP differ in the way that they establish a connection between two endpoints? A. TCP uses the three-way handshake, and UDP does not guarantee message delivery. B. TCP uses synchronization packets, and UDP uses acknowledgment packets. C. UDP provides reliable message transfer, and TCP is a connectionless protocol. D. UDP uses SYN, SYN ACK, and FIN bits in the frame header while TCP uses SYN, SYN ACK, and ACK bits. - answerCorrect Answer: A
Which 802.11 frame type is Association Response? A. management B. protected frame C. action D. control - answerCorrect Answer: A
There are three main types of 802.11 frames: the Data Frame, the Management Frame and the Control Frame. Association Response belongs to Management Frame. Association response is sent in response to an association request.
8 In which way does a spine-and-leaf architecture allow for scalability in a network when
additional access ports are required? A. A spine switch and a leaf switch can be added with redundant connections between them. B. A spine switch can be added with at least 40 GB uplinks. C. A leaf switch can be added with connections to every spine switch. D. A leaf switch can be added with a single connection to a core spine switch. - answerCorrect Answer: C Spine-leaf architecture is typically deployed as two layers: spines (such as an aggregation layer), and leaves (such as an access layer). Spine-leaf topologies provide high-bandwidth, low-latency, nonblocking server-toserver connectivity. Leaf (aggregation) switches are what provide devices access to the fabric (the network of spine and leaf switches) and are typically deployed at the top of the rack. Generally, devices connect to the leaf switches. Devices can include servers, Layer 4-7 services (firewalls and load balancers), and WAN or Internet routers. Leaf switches do not connect to other leaf switches. In spine-and-leaf architecture, every leaf should connect to every spine in a full mesh. Spine (aggregation) switches are used to connect to all leaf switches and are typically d
What identifies the functionality of virtual machines? A. The hypervisor communicates on Layer 3 without the need for additional resources. B. Each hypervisor supports a single virtual machine and a single software switch. C. The hypervisor virtualizes physical components including CPU, memory, and storage. D. Virtualized servers run efficiently when physically connected to a switch that is separate from the hypervisor. - answerCorrect Answer: C
10 Which command automatically generates an IPv6 address from a specified IPv6 prefix and MAC address of an interface? A. ipv6 address dhcp B. ipv6 address 2001:DB8:5:112::/64 eui-64 C. ipv6 address autoconfig D. ipv6 address 2001:DB8:5:112::2/64 link-local - answerCorrect Answer: C
ipv6 address autoconfig command causes the device to perform IPv6 stateless The address auto-configuration to discover prefixes on the link and then to add the EUI-64 based addresses to the interface. Addresses are configured depending on the prefixes received in Router Advertisement (RA) messages. The device will listen for RA messages which are transmitted periodically from the router (DHCP Server). This RA message allows a host to create a global IPv6 address from: - Its interface identifier (EUI-64 address) - Link Prefix (obtained via RA) Note: Global address is the combination of Link Prefix and EUI-64 address
11 When configuring IPv6 on an interface, which two IPv6 multicast groups are joined? (Choose two.) A. 2000::/3 B. 2002::5 C. FC00::/7 D. FF02::1 E. FF02::2 - answerCorrect Answer: DE
When an interface is configured with IPv6 address, it automatically joins the all nodes (FF02::1) and solicitednode (FF02::1:FFxx:xxxx) multicast groups. The all- node group is used to communicate with all interfaces on the local link, and the solicited-nodes multicast group is required for link-layer address resolution. Routers also join a third multicast group, the all-routers group (FF02::2). What is the default behavior of a Layer 2 switch when a frame with an unknown destination MAC address is received? A. The Layer 2 switch forwards the packet and adds the destination MAC address to its MAC address table. B. The Layer 2 switch sends a copy of a packet to CPU for destination MAC address learning.
C. The Layer 2 switch floods packets to all ports except the receiving port in the given VLAN. D. The Layer 2 switch drops the received frame. - answerCorrect Answer: C
If the destination MAC address is not in the CAM table (unknown destination MAC address), the switch sends the frame out all other ports that are in the same VLAN as the received frame. This is called flooding. It does not flood the frame out the same port on which the frame was received.
14 An engineer must configure a /30 subnet between two routes. Which usable IP address and subnet mask combination meets this criteria? A. interface e0/0 description to XX-AXXX:XXXXX ip address 10.2.1.3 255.255.255.252 B. interface e0/0 description to XX-AXXX:XXXXX ip address 192.168.1.1 255.255.255.248 C. interface e0/0 description to XX-AXXX:XXXXX ip address 172.16.1.4 255.255.255.248 D. interface e0/0 description to XX-AXXX:XXXXX ip address 209.165.201.2 225.255.255.252 - answerCorrect Answer: D
Which network allows devices to communicate without the need to access the Internet? A. 172.9.0.0/16 B. 172.28.0.0/16 C. 192.0.0.0/8 D. 209.165.201.0/24 - answerCorrect Answer: B
Which IPv6 address type provides communication between subnets and cannot route on the Internet? A. link-local B. unique local C. multicast D. global unicast - answerCorrect Answer: B
A IPv6 Unique Local Address is an IPv6 address in the block FC00::/7. It is the approximate IPv6 counterpart of the IPv4 private address. It is not routable on the global
Internet. Note: In the past, Site-local addresses (FEC0::/10) are equivalent to private IP addresses in IPv4 but now they are deprecated. Link-local addresses only used for communications within the local subnet. It is usually created dynamically using a link-
local prefix of FE80::/10 and a 64-bit interface identifier (based on 48-bit MAC address)
Which IPv6 address block sends packets to a group address rather than a single address? A. 2000::/3 B. FC00::/7 C. FE80::/10 D. FF00::/8 - answerCorrect Answer: D
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