Chapter 7 Test
27. What subnet mask is represented by the slash notation /20? 255.255.255.248 255.255.224.0 255.255.240.0 255.255.255.0 255.255.255.192
255.255.240.0*
10 Which two flags in the TCP header are used in a TCP three-way handshake to establish connectivity between two network devices? (Choose two.) RST FIN SYN ACK URG PSH
SYN* ACK*
18 Fill in the blank. During a TCP session, the ____________ field is used by the client to request communication with the server.
"SYN"
7 What is the complete range of TCP and UDP well-known ports? 0 to 255 256 - 1023 0 to 1023 1024 - 49151
0 to 1023*
1 A PC is downloading a large file from a server. The TCP window is 1000 bytes. The server is sending the file using 100-byte segments. How many segments will the server send before it requires an acknowledgment from the PC? 1 segment 10 segments 100 segments 1000 segments
10 segments*
30. Which three IP addresses are private ? (Choose three.) 10.1.1.1 172.32.5.2 192.167.10.10 172.16.4.4 192.168.5.5 224.6.6.6
10.1.1.1* 172.16.4.4* 192.168.5.5*
42. Fill in the blank. The binary equivalent of the decimal number 232 is _______________.
11101000
41. Fill in the blank. The decimal equivalent of the binary number 10010101 is _________________ .
149
23. How many bits are in an IPv4 address? 32 64 128 256
32*
32. Which of these addresses is the shortest abbreviation for the IP address: 3FFE : 1044 : 0000 : 0000 : 00AB : 0000 : 0000 : 0057? 3FFE : 1044 :: AB :: 57 3FFE : 1044 :: 00AB :: 0057 3FFE : 1044 : 0 : 0 : AB :: 57 3FFE : 1044 : 0 : 0 : 00AB :: 0057 3FFE : 1044 : 0000 : 0000 : 00AB :: 57 3FFE : 1044 : 0000 : 0000 : 00AB :: 0057
3FFE : 1044 : 0 : 0 : AB :: 57
19 Fill in the blank using a number. A total of _______________ messages are exchanged during the TCP session termination process between the client and the server.
4
43. Fill in the blank. What is the decimal equivalent of the hex number 0x3F? _________________
63
29. What are three characteristics of multicast transmission? (Choose three.) The source address of a multicast transmission is in the range of 224.0.0.0 to 224.0.0.255. A single packet can be sent to a group of hosts. Multicast transmission can be used by routers to exchange routing information. The range of 224.0.0.0 to 224.0.0.255 is reserved to reach multicast groups on a local network. Computers use multicast transmission to request IPv4 addresses. Multicast messages map lower layer addresses to upper layer addresses.
A single packet can be sent to a group of hosts.* Multicast transmission can be used by routers to exchange routing information.* The range of 224.0.0.0 to 224.0.0.255 is reserved to reach multicast groups on a local network.*
5 Which scenario describes a function provided by the transport layer? A student is using a classroom VoIP phone to call home. The unique identifier burned into the phone is a transport layer address used to contact another network device on the same network. A corporate worker is accessing a web server located on a corporate network. The transport layer formats the screen so the web page appears properly no matter what device is being used to view the web site. A student has two web browser windows open in order to access two web sites. The transport layer ensures the correct web page is delivered to the correct browser window.
A student has two web browser windows open in order to access two web sites. The transport layer ensures the correct web page is delivered to the correct browser window.*
40. What field content is used by ICMPv6 to determine that a packet has expired? TTL field CRC field Hop Limit field Time Exceeded field
Hop Limit field*
37. Which protocol supports Stateless Address Autoconfiguration (SLAAC) for dynamic assignment of IPv6 addresses to a host? ARPv6 DHCPv6 ICMPv6 UDP
ICMPv6*
39. What is indicated by a successful ping to the ::1 IPv6 address? The host is cabled properly. The default gateway address is correctly configured. All hosts on the local link are available. The link-local address is correctly configured. IP is properly installed on the host.
IP is properly installed on the host.*
21 What does a client do when it has UDP datagrams to send? It just sends the datagrams. It queries the server to see if it is ready to receive data. It sends a simplified three-way handshake to the server. It sends to the server a segment with the SYN flag set to synchronize the conversation.
It just sends the datagrams.*
6 Which transport layer feature is used to guarantee session establishment? UDP ACK flag TCP 3-way handshake UDP sequence number TCP port number
TCP 3-way handshake*
11 What happens if the first packet of a TFTP transfer is lost? The TFTP application will retry the request if a reply is not received. The next-hop router or the default gateway will provide a reply with an error code. The client will wait indefinitely for the reply. The transport layer will retry the query if a reply is not received.
The TFTP application will retry the request if a reply is not received.*
3 A technician wishes to use TFTP to transfer a large file from a file server to a remote router. Which statement is correct about this scenario? The file is segmented and then reassembled in the correct order by TCP. The file is not segmented, because UDP is the transport layer protocol that is used by TFTP. Large files must be sent by FTP not TFTP. The file is segmented and then reassembled in the correct order at the destination, if necessary, by the upper-layer protocol.
The file is segmented and then reassembled in the correct order at the destination, if necessary, by the upper-layer protocol.*
35. What are three parts of an IPv6 global unicast address? (Choose three.) an interface ID that is used to identify the local network for a particular host a global routing prefix that is used to identify the network portion of the address that has been provided by an ISP a subnet ID that is used to identify networks inside of the local enterprise site a global routing prefix that is used to identify the portion of the network address provided by a local administrator an interface ID that is used to identify the local host on the network
a global routing prefix that is used to identify the portion of the network address provided by a local administrator an interface ID that is used to identify the local host on the network* a global routing prefix that is used to identify the network portion of the address that has been provided by an ISP* a subnet ID that is used to identify networks inside of the local enterprise site*
22 What does a client application select for a TCP or UDP source port number? a predefined value in the dynamic port range a predefined value in the range of the registered ports a predefined value in the well-known port range a random value in the dynamic port range a random value in the range of the registered ports a random value in the well-known port range
a random value in the range of the registered ports*
8 Which two TCP header fields are used to confirm receipt of data? checksum acknowledgment number FIN flag sequence number SYN flag
acknowledgment number* sequence number*
20 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? source port number destination port number sequence number acknowledgment
destination port number*
28. A message is sent to all hosts on a remote network. Which type of message is it? limited broadcast multicast directed broadcast unicast
directed broadcast*
31. Which two IPv4 to IPv6 transition techniques manage the interconnection of IPv6 domains? (Choose two.) trunking dual stack encapsulation tunneling multiplexing
dual stack* tunneling*
9 What is a beneficial feature of the UDP transport protocol? acknowledgment of received data tracking of data segments using sequence numbers fewer delays in transmission the ability to retransmit lost data
fewer delays in transmission*
25. What does the IP address 172.17.4.250/24 represent? network address multicast address host address broadcast address
host address*
33. What type of address is automatically assigned to an interface when IPv6 is enabled on that interface? global unicast link-local loopback unique local
link-local*
34. What are two types of IPv6 unicast addresses? (Choose two.) multicast loopback link-local anycast broadcast
loopback* link-local*
2 A host device needs to send a large video file across the network while providing data communication to other users. Which feature will allow different communication streams to occur at the same time, without having a single data stream using all available bandwidth? multiplexing window size acknowledgments port numbers
multiplexing *
2. Which two parts are components of an IPv4 address? (Choose two.) subnet portion network portion logical portion host portion physical portion broadcast portion
network portion* host portion*
12 Compared to UDP, what factor causes additional network overhead for TCP communication? the identification of applications based on destination port numbers the checksum error detection the encapsulation into IP packets network traffic that is caused by retransmissions
network traffic that is caused by retransmissions*
36. An administrator wants to configure hosts to automatically assign IPv6 addresses to themselves by the use of Router Advertisement messages, but also to obtain the DNS server address from a DHCPv6 server. Which address assignment method should be configured? SLAAC stateless DHCPv6 stateful DHCPv6 RA and EUI-64
stateless DHCPv6*
14 Which factor determines TCP window size? the amount of data the destination can process at one time the number of services included in the TCP segment the amount of data the source is capable of sending at one time the amount of data to be transmitted
the amount of data the destination can process at one time*
38. Which two things can be determined by using the ping command? (Choose two.) the number of routers between the source and destination device the IP address of the router nearest the destination device the average time it takes a packet to reach the destination and for the response to return to the source the destination device is reachable through the network the average time it takes each router in the path between source and destination to respond
the average time it takes a packet to reach the destination and for the response to return to the source* the destination device is reachable through the network*
17 What is a socket? the combination of the source and destination sequence numbers and port numbers the combination of the source and destination sequence and acknowledgment numbers the combination of a source IP address and port number or a destination IP address and port number the combination of the source and destination IP address and source and destination Ethernet address
the combination of a source IP address and port number or a destination IP address and port number*
16 During a TCP session, a destination device sends an acknowledgment number to the source device. What does the acknowledgment number represent? the last sequence number that was sent by the source one number more than the sequence number the next byte that the destination expects to receive the total number of bytes that have been received
the next byte that the destination expects to receive*
26. What is the purpose of the subnet mask in conjunction with an IP address? to uniquely identify a host on a network to identify whether the address is public or private to determine the subnet to which the host belongs to mask the IP address to outsiders
to determine the subnet to which the host belongs*
39. A user is executing a tracert to a remote device. At what point would a router, which is in the path to the destination device, stop forwarding the 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
when the value in the TTL field reaches zero*
