1. Which field in an IPv4 packet header will typically stay the same during its transmission?
Flag
Time-to-Live
Packet Length
Destination Address
2. What is the purpose of ICMP messages?
to inform routers about network topology changes
to ensure the delivery of an IP packet
to provide feedback of IP packet transmissions
to monitor the process of a domain name to IP address resolution
1.
Refer to the exhibit. What will be the result of entering this configuration the next time a network administrator connects a console cable to the router and no additional commands have been entered?
The administrator will be required to enter Cisco123.
The administrator will be required to enter Cisco234.
The administrator will be required to enter Cisco789.
The administrator will be presented with the R1> prompt.
2. Why are port numbers included in the TCP header of a segment?
to indicate the correct router interface that should be used to forward a segment
to identify which switch ports should receive or forward the segment
to determine which Layer 3 protocol should be used to encapsulate the data
to enable a receiving host to forward the data to the appropriate application
to allow the receiving host to assemble the packet in the proper order
1. What is the purpose of issuing the commands cd nvram: then dir at the privilege exec mode of a router?
to clear the content of the NVRAM
to direct all new files to the NVRAM
to list the content of the NVRAM
to copy the directories from the NVRAM
2. Fill in the blank.
...VoIP...defines the protocols and technologies that implement the transmission of voice data over an IP network.
1. Which three layers of the OSI model provide similar network services to those provided by the application layer of the TCP/IP model? (Choose three.)
physical layer
session layer
transport layer
application layer
presentation layer
data link layer
2.
Fill in the blank.
Refer to the exhibit. What command was used to resolve a given host name by querying the name servers? ..NSLOOKUP
1. How many host addresses are available on the network 172.16.128.0 with a subnet mask of 255.255.252.0?
510
512
1022
1024
2046
2048
2. How many usable host addresses are there in the subnet 192.168.1.32/27?
32
30
64
16
62
1. When will a router drop a traceroute packet?
when the router receives an ICMP Time Exceeded message
when the RTT value reaches zero
when the host responds with an ICMP Echo Reply message
when the value in the TTL field reaches zero
when the values of both the Echo Request and Echo Reply messages reach zero
2. Fill in the blank.
What is the decimal equivalent of the hex number 0x3F?...63
1. A host device sends a data packet to a web server via the HTTP protocol. What is used by the transport layer to pass the data stream to the proper application on the server?
sequence number
acknowledgment
source port number
destination port number
2. What does a client application select for a TCP or UDP source port number?
a random value in the well-known port range
a random value in the range of the registered ports
a predefined value in the well-known port range
a predefined value in the range of the registered ports
1. Which two commands can be used on a Windows host to display the routing table? (Choose two.)
netstat -s
route print
show ip route
netstat -r
tracert
2. Which statement about router interfaces is true?
Router LAN interfaces are not activated by default, but router WAN interfaces are.
Once the no shutdown command is given, a router interface is active and operational.
Commands that apply an IP address and subnet mask to an interface are entered in global configuration mode.
A configured and activated router interface must be connected to another device in order to operate.
1.
A store-and-forward switch always stores the entire frame before forwarding, and checks its CRC and frame length. A cut-through switch can forward frames before receiving the destination address field, thus presenting less latency than a store-and-forward switch. Because the frame can begin to be forwarded before it is completely received, the switch may transmit a corrupt or runt frame. All forwarding methods require a Layer 2 switch to forward broadcast frames.
2. Open the PT Activity. Perform the tasks in the activity instruction and then answer the question.
What destination address will PC1 include in the destination address field of the Ethernet frame that it sends to PC2?
192.168.0.17
192.168.0.34
0030.a3e5.0401
00e0.b0be.8014
0007.ec35.a5c6
1. Which layer of the OSI model is responsible for specifying the encapsulation method used for specific types of media?
application
transport
data link
physical
2. Why are two strands of fiber used for a single fiber optic connection?
The two strands allow the data to travel for longer distances without degrading.
They prevent crosstalk from causing interference on the connection.
They increase the speed at which the data can travel.
They allow for full-duplex connectivity.
