CTS1650 Final Exam Flash cards
What is the complete range of TCP and UDP well-known ports?
0 to 1023
Host-A has the IPv4 address and subnet mask 10.5.4.100 255.255.255.0. Which of the following IPv4 addresses would be on the same network as Host-A? (Choose all that apply
*10.5.4.1 *10.5.4.99
Host-A has the IPv4 address and subnet mask 172.16.4.100 255.255.0.0. Which of the following IPv4 addresses would be on the same network as Host-A? (Choose all that apply?)
*172.16.4.99 *172.6.0.1
Host-A has the IPv4 address and subnet mask 192.168.1.50 255.255.255.0. Which of the following IPv4 addresses would be on the same network as Host-A? (Choose all that apply)
*192.168.1.1 *192.168.1.100
Your organization is issued the IPv6 prefix of 2001:db8:130f::/48 by your service provider. With this prefix, how many bits are available for your organization to create /64 subnetworks if interface ID bits are not borrowed?
16
Host-A has the IPv4 address and subnet mask 172.16.4.100 255.255.0.0. What is the network address of Host-A?
172.16.0.0
What is the valid most compressed format possible of the IPv6 address 2001:0DB8:0000:AB00:0000:0000:0000:1234?
2001:DB8:0:AB00::1234
What is the network address for the IPv6 address 2001:DB8:AA04:B5::1/64?
2001:DB8:AA04:B5::/64
What is the prefix associated with the IPv6 address 2001:DB8:D15:EA:CC44::1/64?
2001:DB8:D15:EA::/64
What is the most compressed representation of the IPv6 address 2001:0db8:0000:abcd:0000:0000:0000:0001?
2001:db8:abcd::1
What subnet mask is represented by the slash notation /20?
255.255.240.0
Which subnet mask would be used if 5 host bits are available?
255.255.255.224
What is the interface ID of the IPv6 address 2001:DB8::1000:A9CD:47FF:FE57:FE94/64?
A9CD:47FF:FE57:FE94
What is indicated by a successful ping to the ::1 IPv6 address?
IP is properly installed on the host.
Which TCP header statement is true?
It consists of 10 fields in a 20 byte header
Which UDP header statement is true?
It consists of 4 fields in an 8-byte header
Why is UDP desirable for protocols that make a simple request and reply transactions?
Low overhead
Which two fields are the same in a TCP and UDP header? (Choose two.)
Which two fields are the same in a TCP and UDP header? (Choose two.) *Destination port number *Source port number
What message is sent by a host to check the uniqueness of an IPv6 address before using that address?
neighbor solicitation
A network administrator can successfully ping the server at www.cisco.com, but cannot ping the company web server located at an ISP in another city. Which tool or command would help identify the specific router where the packet was lost or delayed?
traceroute
How many valid host addresses are available on an IPv4 subnet that is configured with a /26 mask?
62
Which two types of ICMP messages are common to both ICMPv4 and ICMPv6? (Choose two.)
*Destination or Service *Time exceeded
What are the two methods a device can use to generate its own IPv6 interface ID?
*EUI-64 *randomly generated
Which two applications would use the TCP transport layer protocol? (Choose two.)
*FTP *HTTP
Which two applications would use the UDP transport layer protocol? (Choose two.)
*TFTP *VoIP
Which two situations are the result of excessive broadcast traffic? (Choose two)
*slow network operations *slow device operations
Which two things can be determined by using the ping command? (Choose two.)
*the destination device is reachable through the network *the average time it takes a packet to reach the destination and for the response to return to the source
A network administrator is testing network connectivity by issuing the ping command on a router. Which symbol will be displayed to indicate that a time expired during the wait for an ICMP echo reply message?
.
What is the prefix length notation for the subnet mask 255.255.255.224?
/27
Assume a host with IP address 10.1.1.10 wants to request web services from a server at 10.1.1.254. Which of the following would display the correct socket pair?
10.1.1.10:1099, 10.1.1.254:80
If a network device has a mask of /28, how many IP addresses are available for hosts on this network?
14
Which subnet mask would be used if exactly 4 host bits are available?
255.255.255.240
A network administrator is variably subnetting a network. The smallest subnet has a mask of 255.255.255.224. How many usable host addresses will this subnet provide?
30
How many usable IP addresses are available on the 192.168.1.0/27 network?
30
Given a /32 Global Routing Prefix and a /64 prefix, how many bits would be allocated for the Subnet ID?
32
A network administrator subnets the 192.168.10.0/24 network into subnets with /26 masks. How many equal-sized subnets are created?
4
If a network device has a mask of /26, how many IP addresses are available for hosts on this network?
62
Given a /48 Global Routing Prefix and a /64 prefix, what is the subnet portion of the following address: 2001:db8:cafe:1111:2222:3333:4444:5555
1111
What field is used to provide flow control?
Window Size
What is a socket?
the combination of a source IP address and port number or a destination IP address and port number.
What is a function of the tracert command that differs from the ping command when they are used on a workstation?
the tracert command shows the information of routers in the path.
Which ICMP message is used by the traceroute utility during the process of finding the path between two end hosts?
time exceeded
What is the purpose of the subnet mask in conjunction with an IP address?
to determine the subnet to which the host belongs
What is the minimum configuration for a router interface that is enabled for IPv6?
to have a link-local IPv6 address
Why does a Layer 3 device perform the ANDing process on a destination IP address and subnet mask?
to identify the network address of the destination network.
What is the purpose of using a source port number in a TCP communication?
to keep track of multiple conversations between devices
A user who is unable to connect to the file server contacts the help desk. The helpdesk technician asks the user to ping the IP address of the default gateway that is configured on the workstation. What is the purpose for this ping command?
to test that the host has the capability to reach hosts on other networks.
Which Windows command would display the protocols in use, the local address and port numbers, the foreign address and port numbers, and the connection state?
netstat
Which command can be used to test connectivity between two devices using echo request and echo reply messages?
ping
Which utility uses the Internet Control Messaging Protocol (ICMP)?
ping
Which two statements are correct about private IPv4 addresses? (Choose two.)
*Private IPv4 addresses are assigned to devices within an organizations intranet. *Any organization can use the 10.0.0.0/8 address
Which two statements are correct about public IPv4 addresses? (Choose two.)
*To access a device over the internet, the destination IPv4 address must be a public address. *Public IPv4 address exhaustion is a reason why there are private IPv4 addresses and why organizations are transitioning to IPv6.
What are three parts of an IPv6 global unicast address? (Choose three.)
*a global routing prefix that is used to identify the network portion of the address that has been provided by an ISP *an interface ID that is used to identify the local host on the network *a subnet ID that is used to identify networks inside of the local enterprise site
Which two operations are provided by TCP but not by UDP? (Choose two.)
*acknowledging received data *retransmitting any unacknowledged data
Which three are transport layer responsibilities? (Choose three.)
*conversation multiplexing *segmenting data and reassembling segments *tracking individual conversations
Which two parts are components of an IPv4 address? (Choose two.)
*network portion *host portion
How does a networked server manage requests from multiple clients for different services?
Each request has a combination of source and destination port numbers, coming from a unique IP address.
Which IPv6 network prefix is only intended for local links and can not be routed?
FE80::/10
True or False: 4 out of 5 RIRs no longer have enough IPv4 addresses to allocate to customers on a regular basis.
False
True or false? RA messages are sent to all IPv6 routers by hosts requesting addressing information.
False
What field content is used by ICMPv6 to determine that a packet has expired?
Hop Limit field
Which protocol is used by IPv4 and IPv6 to provide error messaging?
ICMP
Which protocol provides feedback from the destination host to the source host about errors in packet delivery?
ICMP
Which dynamic addressing method for GUAs is the one where devices rely solely on the contents of the RA message for their addressing information?
Method 1: SLAAC
Which dynamic addressing method for GUAs is the one where devices get their IPv6 configuration in a RA message and request DNS information from a DHCPv6 server?
Method 2: SLAAC and stateless DHCPv6
Which dynamic addressing method for GUAs is the one where devices rely solely on a DHCPv6 server for their addressing information?
Method 3: Stateful DHCPv6
Which organization or group of organizations receives IP addresses from IANA and is responsible for allocating these addresses to ISPs and some organizations?
RIRs
Which devices will not forward an IPv4 broadcast packet by default?
Router
Which type of ICMPv6 message would a host send to acquire an IPv6 configuration when booting up?
Router Solicitation (RS) message
Which control bit flags are used during the three-way handshake?
SYN and ACK
What field is used by the destination host to reassemble segments into the original order?
Sequence Number
Which of the following would be valid source and destination ports for a host connecting to a DNS server?
Source 49152, Destination: 53
Which of the following would be valid source and destination ports for a host connecting to an email server?
Source: 49152, Destination: 25
Which field in an IPv6 GUA is used for subnetting?
Subnet ID
Which transport layer protocol ensures reliable same-order delivery?
TCP
Which transport layer feature is used to establish a connection-oriented session?
TCP 3-way handshake
A user calls to report that a PC cannot access the internet. The network technician asks the user to issue the command ping 127.0.0.1 in a command prompt window. The user reports that the result is four positive replies. What conclusion can be drawn based on this connectivity test?
The TCP/IP implementation is functional
What happens if part of an FTP message is not delivered to the destination?
The part of the FTP message that was lost is resent
What happens when a sending host senses there is congestion?
The sending host reduces the number of bytes it sends before receiving an acknowledgement from the destination host.
Which statement is true about variable-length subnet masking?
The size of each subnet may be different, depending on requirements.
Network congestion has resulted in the source learning of the loss of TCP segments that were sent to the destination. What is one way that the TCP protocol addresses this?
The source decreases the amount of data that it transmits before it receives an acknowledgement from the destination.
True or False? IPv6 was designed with subnetting in mind.
True
Which of the following is a stateless best-effort delivery transport layer protocol?
UDP
Which transport layer protocol statement is true?
UDP is a best-effort delivery protocol
Which UDP datagram reassembly statement is true?
UDP reassembles the data in the order that it was received.
Which transport layer protocol would be used for VoIP applications?
User Datagram Protocol (UDP)
What type of applications are best suited for using UDP?
applications that are sensitive to delay
Which address type is not supported in IPv6?
broadcast
What is the most important motivating factor for moving to IPv6?
depletion of IPv4 addresses
Which of the following techniques use native IPv6 connectivity?
dual stack
How many exchanges are needed to end both sessions between two hosts?
four exchanges
What does the IP address 172.17.4.250/24 represent?
host address
What is the purpose of the command ping ::1?
it tests the internal configuration of an IPv6 host.
At a minimum, which address is required on IPv6-enabled interfaces?
link-local
What type of address is automatically assigned to an interface when IPv6 is enabled on that interface?
link-local
Which type of IPv6 address is not routable and used only for communication on a single subnet?
link-local address
A technician is troubleshooting a network where it is suspected that a defective node in the network path is causing packets to be dropped. The technician only has the IP address of the end point device and does not have any details of the intermediate devices. What command can the technician use to identify the faulty node?
tracert
Which layer is responsible for establishing a temporary communication session between the source and destination host applications?
transport layer
Which port group includes port numbers for FTP, HTTP, and TFTP applications?
well-known ports
Host-A has the IPv4 address and subnet mask 10.5.4.100 255.255.255.0. What is the network address of Host-A?
10.5.4.0
