Elance TCP/IP Test Answers 2015
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Which of the following is NOT a valid class of
IP addresses?
Class B
Class C
Class F
Class A
Which of the following is an VALID RIP packet
type?
Request packet
Response packet
Data packet
Request packet and Response packet
Which of the following is a VALID use of IP
address 14.0.0.0/8?
Multicast
"This" network
Public-data networks
Cable television networks
Which of the following is the maximum length
of an IP datagram?
65,535 octets
65,536 octets
75,535 octets
66,535 octets
Layer 4 of the OSI model contains the TCP and
UDP protocols, what is FALSE about UDP?
Stands for User Datagram Protocol
Does not contain any port numbers
Low overhead
Unreliable
What is the purpose of the ARP (Address
Resolution Protocol)?
Resolves a MAC address to an IP address
Resolves a DNS name to a MAC address
Resolves an IP address to a MAC address
Resolves a MAC address to a DNS name
What is the primary Layer 3 protocol in the
TCP/IP suite?
ARP
UDP
TCP
IP
TCP contains fields in the header of TCP
Segment to identify upper layer applications, what are these fields?
Source and Destination Port Numbers
The TTL field
The TYPE field
Options
Which of the following IP addresses use 8 bits
for the <network> and 24 bits for the <host> portion of the IP
address?
Class A addresses
Class D addresses
Class C addresses
Class B addresses
Which of the following correctly describes
Dynamic Host Configuration Protocol (DHCP) message type DHCPRELEASE?
Response from a server to a DHCPDISCOVER and
offering IP address and other parameters
Message from client to server cancelling remainder
of a lease and relinquishing network address
Broadcast by a client to find available DHCP
servers
Acknowledgement from server to client with
parameters, including IP address
IP addresses are represented by a which of the
following sized unsigned binary value?
32-bit
64-bit
128-bit
256-bit
Which of the following commands can be used on
some IP hosts to list the details of fragmentation?
netstat
ipconfig
config
net
A server that has HTTP services and SMTP
services bound to an interface functions with what protocol?
DHCP
UDP
TCP
IP
Which of the following correctly describes
Dynamic Host Configuration Protocol (DHCP) message type DHCPOFFER?
Acknowledgement from server to client with
parameters, including IP address
Response from a server to a DHCPDISCOVER and
offering IP address and other parameters
Broadcast by a client to find available DHCP
servers
Negative acknowledgement from server to client
If you wanted to test to see if a TCP port was
opened on a server, what command/tool would you use?
Firefox
Telnet
Ping
FTP
Which of the following IP addresses is a class
A Network?
128.30.33.1
0.0.0.1
191.77.56.1
192.35.111.1
Which of the following IP addresses use 14
bits for the <network> and 16 bits for the <host> portion of the IP
address?
Class C addresses
Class D addresses
Class B addresses
Class A addresses
Which of the following IP addresses use 24
bits for the <network> and 8 bits for the <host> portion of the IP
address?
Class C addresses
Class B addresses
Class A addresses
Class D addresses
Which of the following fields in the header of
an IP packet will be decremented by one at each router?
The Protocol Number
The Time to Live (TTL)
The Header Checksum
The Type of Service
Which of the following is a VALID use of IP
address 224.0.0.0/4?
Multicast
Cable television networks
"This" network
Public-data networks
Given the IP address 82.77.201.1/24, what is
the network number?
82.0.0.0
82.77.201.0
82.77.201.255
82.77.0.0
Which class of IP address provides a maximum
of only 254 host addresses per network ID?
Class B
Class C
Class A
Class D
When using the PING utility, what are you
trying to accomplish?
Determining if a TCP connection can be established
Tracing the route that a IP packet is taking
Does connectivity exist between two IP end points
Are ICMP ports opened on the remote end?
Which of the following is private IP address?
172.15.14.36
192.168.24.43
168.172.19.39
12.0.0.1
What is the telecommunication protocol that
all computers must use to be part of the Internet.
ARP
TCP
IP
UDP
Which of the following type of IP addresses
are suitable for networks with an extremely large number of hosts?
Class A addresses
Class C addresses
Class D addresses
Class B addresses
Which of the following are reserved for
future/experimental/test use?
Class C addresses
Class D addresses
Class E addresses
Class A addresses
TCP is a "Blank" protocol.
Best Effort
Connection Oriented
Unreliable
Connectionless
Which of the following addresses have : First
24 bits : Network address Last 8 bits : Local host address
Class B addresses
Class D addresses
Class C addresses
Class A addresses
Which of the following protocol adds no
reliability, flow-control, or error recovery to IP and simply serves as a
multiplexer/demultiplexer for sending and receiving datagrams, using ports to
direct the datagrams?
User Datagram Protocol (UDP)
Address Resolution Protocol (ARP)
Internet Protocol (IP)
Internet Control Message Protocol (ICMP)
Which protocol ensures reliable delivery
UDP
NETBEUI
IP
TCP
Which of the following IP addresses are
reserved for multicasting (broadcasting)?
Class D addresses
Class B addresses
Class C addresses
Class A addresses
Which of the following networks major networks
contain an incorrect subnet mask?
Class D with a mask 255.255.255.255 or /32
Class C with a mask 255.255.255.0 or /24
Class B with a mask 255.255.0.0 or /16
Class A with a mask 255.0.0.0 or /8
The network number portion of the IP address
is administered by which of the following?
Asia Pacific Network Information Centre (APNIC)
American Registry for Internet Numbers (ARIN)
Reseaux IP Europeans (RIPE)
All of the given options are valid
Which of the following is an interface between
an application/program/software and network?
subnet
socket
datagram
handle
Which of the following is a VALID dynamic
routing protocol category?
Path vector protocols
All of the given options are valid
Link state protocols
Distance vector protocols
What technology exists that allows a
non-routable IP address to communicate with the global IP Internet Network.
NAT (Network Address Translation)
Route Summarization
CIDR Network address
eBGP
Which IP address is reserved for loopback
testing?
0.0.0.0
127.256.0.1
192.168.1.1
127.0.0.1
A user loads a web browser and browses to
http://www.google.com, what is the highest layer of the OSI model the user is
functioning at?
Session Layer
Application Layer
Transport Layer
Network Layer
You want to implement a mechanism that
automates the IP configuration, including IP address, subnet mask, default
gateway, and DNS information. Which protocol will you use to accomplish this?
ARP
DHCP
TFTP
SMTP
SNMP
Which protocol deals with resolving domain
names
NETBIOS
DNS
SMTP
SPX
Which protocol deals with emails
FTP
X Windows
SMTP
LPD
You are a Network Administrator for the ACME
company; one of your webservers had a hardware issue, so you moved the IP
address (192.168.1.99) to another webserver. Users from other networks are
reporting that they still are not able to access the website. You are able to
access the website locally; What is the best answer that will fix the issue.
Update NAT
Start the Web Service application
Add a firewall Rule
Clear the ARP Cache on the router
Your ISP has given you a block of addresses:
199.200.199.0/25; how many IP addresses are available for devices on a network.
256
254
126
25
A router that responds to an ARP request
intended for a remote host is called what?
Proxy IP
Inverse ARP
Gratutious ARP
Proxy ARP
Which of the following TCP/IP protocol layer
is also called as a link layer or the data-link layer?
Session
Network interface
Application
Transport
Which of the following allows a router to
respond to an ARP request that is intended for a remote host?
Proxy ARP
Gateway DP
Reverse ARP (RARP)
Inverse ARP (IARP)
If you use either Telnet or FTP, which is the
highest layer you are using to transmit data?
Transport
Session
Application
Presentation
Which of the following TCP/IP protocol layer
is also called as internet layer or the network layer?
Network interface
Application
Session
Internetwork layer
Internet Protocol (IP) is the most important
protocol in which of the following layer
Session
Application
Internetwork layer
Network interface
TCP contains several features that benefit the
protocol, which of the following answers is not a feature?
Full Duplex
Point to Point
Low overhead
Reliable
If a maximum MTU was set to 1300 in the
Windows Vista operating system, what would be the smallest packet you can send
if you utilize the PING command with the Don't Fragment bit option set?
1272
1372
1300
1500
Which protocol uses window flow system
NONE OF THE ABOVE.
UDP
FTP
TCP
Dynamic Host Configuration Protocol (DHCP)
supports which of the following mechanisms for IP address allocation?
Dynamic allocation
Automatic allocation
Manual allocation
All of the given options are correct
There are 5 class of IPv4 addresses, what are
the class D addresses used for?
Unicast
Multicast
Broadcast
Experiental
Which of the following TCP/IP layer provides
the end-to-end data transfer by delivering data from an application to its
remote peer?
Session
Application
Transport
Network interface
When a host is generating an ARP packet, what
is unknown?
The Sender’s IP address
The Target’s Ethernet Hardware Address
The Target's Hardware port number
The sender’s Ethernet Hardware Address
Which of the following protocol messages
belong to STD 5?
Address Resolution Protocol (ARP)
Internet Protocol (IP)
Internet Control Message Protocol (ICMP)
User Datagram Protocol (UDP)
TCP/IP reference model contains how many
layers
4
3
7
2
Which of the following is NOT a valid Dynamic
Host Configuration Protocol (DHCP) message type?
DHCPDISCOVER
DHCPNRELEASE
DHCPREQUEST
DHCPOFFER
The TCP 3-Way handshake contains three
messages that are exchange between two hosts before any application data is
transmitted, what does a SYN-ACK message indicate?
First message of a 3-Way handshake
Second message of a 3-Way handshake
Third and final message of a 3 way handshake
None of the above
Which of the following is TRUE about Interior
Gateway Protocols (IGPs)?
Allow the exchange of summary information between
autonomous systems
Allow the exchange of information only within known
systems
None of the given options are valid
Allow routers to exchange information within an
autonomous system
Which of the following is NOT a protocol
associated with the TCP/IP transport layer?
Both User Datagram Protocol (UDP) and Transmission
Control Protocol (TCP)
Internet Protocol (IP)
Transmission Control Protocol (TCP)
User Datagram Protocol (UDP)
What debugging tool would you use to
troubleshoot TCP connections from client to a server that was experiencing slow
transfers and intermittent connectivity?
Ping
Wireshark/TCPDump
Telnet
Traceroute
At layer 4, what port is reserved for TFTP and
what protocol is used?
69, TCP
96, UDP
69, UDP
161, UDP
An IPv4 header contains a Time To Live (TTL)
field, what is the purpose of TTL?
To prevent routing loops
How long a learned route remains in the routing
table before being dropped
Used to track of the number of routers that can
forward traffic
To count how many routers are in the path between
the source and destination
You were given a network address of
67.230.100.64/27 from your ISP, what would the broadcast address be?
4.18.15.16.23.42
67.230.100.96
67.230.100.95
255.255.255.255
Which of the following is a rfc1918 address?
82.41.108.21
172.33.41.100
191.34.100.1
10.70.40.103
Which of the following correctly define
maximum transmission unit (MTU)?
Minimum required frame size of a physical network
as per standards
Minimum supported length of an IP datagram
Maximum length of an IP datagram
Maximum frame size of a physical network
Based on the provided answers, what is the
best INCORRECT answer for ICMP?
The primary function of ICMP is for error
notification between routers and hosts
ICMP is encapsulated in IP packets
If an ICMP packet is dropped, a new ICMP packet
will be generated
ICMP stands for the Internet Control Message
Protocol
An IP header contains a "Blank"
field that identifies the type of data that is encapsulated in an IP Packet.
The Protocol Number
The Time to Live
The Type of Service
The Header Checksum
Who invented TCP/IP?
Cerf and Postal
Cerf and Kahn
Kahn and Duvall
Crocker and Duvall
Which of the following is a VALID use of IP
address 0.0.0.0/8?
Cable television networks
Public-data networks
"This" network
Multicast
Which of the following is not true regarding
the traceroute application?
It uses the TTL field to determine routers in the
path between the source and destination hosts
It traces out ap IP path taken by IP packets to a
given destination
It uses TCP packets encapsulated in an IP packet
None of these
Which of the following is a connectionless
network socket ?
Raw socket
All of the given options are valid
Datagram socket
Stream socket
How does a host determine that an IP address
is not located on the local network?
"The ANDing process"
The host would ARP to determine if the host is
local or not.
The DHCP notifies the host if the IP is remote or
not.
Any host will transmit all packets to the default
gateway
You have a network address of 192.168.56.0
with four subnets. You want to allow for maximum number of Hosts. What is the
subnet mask you need to apply?
255.255.255.192
255.255.224.0
255.255.255.224
255.255.255.128
Which of the following is not a valid TCP/IP
protocol layer ?
Session
Application
Transport
Internetwork
Which of the following is the decimal and
hexadecimal equivalents of the binary number 01101101?
182, 7D
109, 6D
182, 6D
109, 6F
VERSION, IHL, TOS etc are valid properties of
which of the following?
Subnet
IP datagram
IP Header
IP Data
What layer in the TCP/IP stack is equivalent
to the Transport layer of the OSI model?
Host-to-Host
Internet
Network Access
Application
What is binary
00011000.01001100.01111001.00001010 equivalent to in Decimal?
24.67.121.11
24.76.121.10
24.77.121.10
24.76.211.10
Which of the following protocols was designed
to overcome the weaknesses of RARP (Reverse Address Resolution Protocol)?
Address Resolution Protocol (ARP)
Internet Group Management Protocol (IGMP)
Reverse Address Resolution Protocol (RARP)
Bootstrap Protocol (BOOTP)
Assuming no PPP compression, standard network
MTU of 1500, an IP packet that contains a TCP segment with TCP timestamps and
is encapsulated in a Ethernet frame with no 802.1q tags, what would the data
rate efficiency be?
94.1482%
97.3333%
95.9264%
96.1781%
What is the maximum size of RIP datagrams?
256 octet
64 octet
128 octet
512 octet
Which of the following socket bypass the
normal TCP/IP processing?
All of the given options are valid
Raw socket
Datagram socket
Stream socket
Which of the following is incorrect about an
IPv4 address?
An IP address can be considered to consist of a
Network Part and a Host Part
An IP address is a logical address
An IP address is globally unique in an internetwork
An IP address is 32 bytes long
Which of the following protocol messages
belong to STD 6?
Internet Protocol (IP)
Internet Control Message Protocol (ICMP)
User Datagram Protocol (UDP)
Address Resolution Protocol (ARP)
Which of the following is NOT a protocol
associated with the TCP/IP internetwork layer?
Internet Control Message Protocol (ICMP)
Address Resolution Protocol (ARP)
User Datagram Protocol (UDP)
Internet Protocol (IP)
Which of the following is a VALID use of IP
address 24.0.0.0/8?
"This" network
Cable television networks
Public-data networks
Multicast
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