Chapter 9: Transport Layer

72

Given the network address of 192.168.5.0 and a subnet mask of 255.255.255.224, how many addresses are wasted in total by subnetting each network with a subnet mask of 255.255.255.224?

72

Given the network address of 192.168.5.0 and a subnet mask of 255.255.255.224, how many total host addresses are unused in the assigned subnets?

Three

How many bits must be borrowed from the host portion of an address to accommodate a router with five connected networks?

4

How many broadcast domains are there?

1022

How many host addresses are available on the network 172.16.128.0 with a subnet mask of 255.255.252.0?

30

How many usable host addresses are there in the subnet 192.168.1.32/27?

/25

In a network that uses IPv4, what prefix would best fit a subnet containing 100 hosts?

172.25.0.126

In dotted decimal notation, the IP address ************ is the last host address for the network 172.25.0.64/26.

255.255.254.0

In dotted decimal notation, the subnet mask ************ will accommodate 500 hosts per subnet. Consider the following range of addresses: 2001:0DB8:BC15:00A0:0000:: 2001:0DB8:BC15:00A1:0000:: 2001:0DB8:BC15:00A2:0000::

IP address: 192.168.10.38 subnet mask: 255.255.255.248, default gateway: 192.168.10.33*

The network administrator has assigned the LAN of LBMISS an address range of 192.168.10.0. This address range has been subnetted using a /29 prefix. In order to accommodate a new building, the technician has decided to use the fifth subnet for configuring the new network (subnet zero is the first subnet). By company policies, the router interface is always assigned the first usable host address and the workgroup server is given the last usable host address. Which configuration should be entered into the properties of the workgroup server to allow connectivity to the Internet?

/72

When subnetting a /64 IPv6 network prefix, which is the preferred new prefix length?

The amount of data the destination can process at one time

Which factor determines TCP window size?

ACK

Which flag in the TCP header is used in response to a received FIN in order to terminate connectivity between two network devices?

SMTP FTP HTTP

Which three application layer protocols use TCP?

Destination devices receive traffic with minimal delay Received data is unacknowledged

Which two characteristics are associated with UDP sessions?

ACK SYN

Which two flags in the TCP header are used in a TCP three-way handshake to establish connectivity between two network devices?

/64 /68

Which two notations are useable nibble boundaries when subnetting in IPv6?

It eliminates most address configuration errors It reduces the burden on network support staff

Which two reasons generally make DHCP the preferred method of assigning IP addresses to hosts on large networks?

because HTTP requires reliable delivery

Why does HTTP use TCP as the transport layer protocol?

10 segments

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?

192.168.1.64/27 192.168.1.96/28

A company has a network address of 192.168.1.64 with a subnet mask of 255.255.255.192. The company wants to create two subnetworks that would contain 10 hosts and 18 hosts respectively. Which two networks would achieve that?

255.255.255.128

A company uses the address block of 128.107.0.0/16 for its network. What subnet mask would provide the maximum number of equal size subnets while providing enough host addresses for each subnet in the exhibit?

The gateway address is in the wrong subnet

A computer that is configured with the IPv6 address as shown in the exhibit is unable to access the internet. What is the problem?

The device will continue receiving the streaming video, but there may be a momentary disruption

A host device is receiving live streaming video. How does the device account for video data that is lost during transmission?

Multiplexing

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?

6

A network administrator is variably subnetting a network. The smallest subnet has a mask of 255.255.255.248. How many host addresses will this subnet provide??

Predictable static IP addresses for easier identification

A network administrator needs to monitor network traffic to and from servers in a data center. Which features of an IP addressing scheme should be applied to these devices?

4

A nibble consists of * bits

destination IP address -> 192.168.2.2 destination port number -> 80 source IP address -> 192.168.1.2 source port number -> 2578

Consider a datagram that originates on the PC and that is destined for the web server. Match the IP addresses and port numbers that are in that datagram to the description.

The next byte that the destination expects to receive

During a TCP session, a destination device sends an acknowledgment number to the source device. What does the acknowledgment number represent?

Host A and host B are on overlapping subnets

Open the PT Activity. Perform the tasks in the activity instructions and then answer the question. What issue is causing Host A to be unable to communicate with Host B?

The source will decrease the amount of data that it sends before it must receive acknowledgements from the destination

What does TCP do if the sending source detects network congestion on the path to the destination?

It just sends the datagrams

What does a client do when it has UDP datagrams to send?

The part of the FTP message that was lost is re-sent

What happens if part of an FTP message is not delivered to the destination?

The TFTP application will retry the request if a reply is not received

What happens if the first packet of a TFTP transfer is lost?

Sequence numbers

What information is used by TCP to reassemble and reorder received segments?

UDP reassembles the received datagrams in the order they were received

What is a characteristic of UDP?

There can be many ports open simultaneously on a server, one for each active server application

What is a characteristic of a TCP server process?

The combination of a source IP address and port number or a destination IP address and port number

What is a socket?

0 - 1023

What is the complete range of TCP and UDP well-known ports?

2001:DB8:BC15:A::0

What is the subnet address for the address 2001:DB8:BC15:A:12AB::1/64?

Registered port

What kind of port must be requested from IANA in order to be used with a specific application?

Destination and source port numbers

What type of information is included in the transport header?

Hosts accessible from the Internet

When developing an IP addressing scheme for an enterprise network, which devices are recommended to be grouped into their own subnet or logical addressing group?

when an application can tolerate some loss of data during transmission

When is UDP preferred to TCP?