20 What will a host on an Ethernet network do if it receives a frame with a destination MAC address that does not match its own MAC address?
It will discard the frame.
It will forward the frame to the next host.
It will remove the frame from the media.
It will strip off the data-link frame to check the destination IP address.
21 What are two actions performed by a Cisco switch? (Choose two.)
building a routing table that is based on the first IP address in the frame header
using the source MAC addresses of frames to build and maintain a MAC address table
forwarding frames with unknown destination IP addresses to the default gateway
utilizing the MAC address table to forward frames via the destination MAC address
examining the destination MAC address to add new entries to the MAC address table
22 What are two examples of the cut-through switching method? (Choose two.)
store-and-forward switching
fast-forward switching
CRC switching
fragment-free switching
QOS switching
23
Refer to the exhibit.
If host A sends an IP packet to host B, what will the destination address be in the frame when it leaves host A?
DD:DD:DD:DD:DD:DD
172.168.10.99
CC:CC:CC:CC:CC:CC
172.168.10.65
BB:BB:BB:BB:BB:BB
AA:AA:AA:AA:AA:AA
24 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
25 What information is added during encapsulation at OSI Layer 3?
source and destination MAC
source and destination application protocol
source and destination port number
source and destination IP address
26 What are two functions of NVRAM? (Choose two.)
to store the routing table
to retain contents when power is removed
to store the startup configuration file
to contain the running configuration file
to store the ARP table
27
Refer to the exhibit. The network
administrator for a small advertising company has chosen to use the 192.168.5.96/27 network for internal LAN addressing. As shown in the exhibit, a static IP address is assigned to the company web server. However, the web server cannot access the Internet. The administrator verifies that local workstations with IP addresses that are assigned by a DHCP server can access the Internet, and the web server is able to ping local workstations. Which component is incorrectly configured?
subnet mask
DNS address
host IP address
default gateway address
28 Why does a Layer 3 device perform the ANDing process on a destination IP address and subnet mask?
to identify the broadcast address of the destination network
to identify the host address of the destination host
to identify faulty frames
to identify the network address of the destination network
29 What are the three ranges of IP addresses that are reserved for internal private use? (Choose three.)
10.0.0.0/8
64.100.0.0/14
127.16.0.0/12
172.16.0.0/12
192.31.7.0/24
192.168.0.0/16
30 Which three addresses are valid public addresses? (Choose three.)
198.133.219.17
192.168.1.245
10.15.250.5
128.107.12.117
192.15.301.240
64.104.78.227
31 What type of IPv6 address is FE80::1?
loopback
link-local
multicast
global unicast
32
Refer to the exhibit. On the basis
of the output, which two statements about network connectivity are correct? (Choose two.)
There is connectivity between this device and the device at 192.168.100.1.
The connectivity between these two hosts allows for videoconferencing calls.
There are 4 hops between this device and the device at 192.168.100.1.
The average transmission time between the two hosts is 2 milliseconds.
This host does not have a default gateway configured.
33 Which subnet would include the address 192.168.1.96 as a usable host address?
192.168.1.64/26
192.168.1.32/27
192.168.1.32/28
192.168.1.64/29
34 How many hosts are addressable on a network that has a mask of 255.255.255.248?
2 6 8 14 16 254
35 Which statement is true about variable-length subnet masking?
Each subnet is the same size.
The size of each subnet may be different, depending on requirements.
CNA第一学期Finaleam考试英文答案RSC
