Question 1

If you are subnetting a class B network,what subnet mask will yield 64 subnets?
A) 255.255.252.0
B) 255.255.64.0
C) 255.255.224.0
D) 255.255.192.0

Accepted Answer

A class B network has a default subnet mask of 255.255.0.0. To subnet a class B network into 64 subnets, we need to borrow 6 bits from the host portion of the IP address. This gives us a subnet mask of 255.255.252.0.

Question 2

Which of the following is a reason that UDP is faster than TCP?
A) it doesn't use port numbers
B) it has a higher priority on the network
C) the header is smaller
D) it doesn't guarantee delivery

Accepted Answer

D

Question 3

Which of the following is the first packet sent in the TCP three-way handshake?
A) RST
B) SYN
C) ACK
D) PSH

Accepted Answer

The first packet sent in the TCP three-way handshake is the SYN packet, which initiates the connection between two devices.

Question 4

What should you do when configuring DNS servers that are connected to the Internet in order to improve security?
A) disable zone transfers
B) delete the DNS cache
C) disable DNS buffers
D) setup DNS proxy

Accepted Answer

Disabling zone transfers helps prevent unauthorized access to a DNS server's zone information, improving security.

Answer: B
 Clearing the DNS cache periodically can help prevent DNS spoofing or cache poisoning attacks, improving security.

Answer: C
 There is no such thing as DNS buffers, so this choice is not relevant.

Answer: D
 Setting up a DNS proxy can improve privacy and performance, but it does not directly enhance security.

Question 5

How are the two parts of an IP address determined?
A) network identifier
B) subnet mask
C) host identifier
D) routing table

Accepted Answer

The answer of How are the two parts of an...

Question 6

Fragmentation of IP packets is normal and doesn't present any networking problems.

Accepted Answer

Fragmentation can lead to increased overhead, potential packet loss, and reduced performance, as each fragment must be processed individually and reassembled at the destination, which can strain network resources and decrease efficiency.

Question 7

What does a sliding window do in a TCP packet?
A) ensures all packets are delivered
B) provides packet security
C) provides flow control
D) ensures transmission reliability

Accepted Answer

The sliding window is a mechanism used for flow control in TCP. It allows the receiver to specify the number of bytes it is willing to receive from the sender at any given time, which enables efficient use of network resources and prevents overwhelming the receiver with too much data.

Question 8

How large is the IPv6 address space?
A) 32 bits
B) 128 bits
C) 64 bits
D) 168 bits

Accepted Answer

The IPv6 address space consists of 128 bits, compared to the 32-bit space of IPv4, providing for a vastly expanded address space that can accommodate an almost unlimited number of devices connected to the internet.

Question 9

The IP address 172.20.1.5 is a private IP address.

Accepted Answer

172.20.1.5 is a private IP address as it falls under the range of private IP addresses defined by the Internet Assigned Numbers Authority (IANA) for use in private networks.

Question 10

What is the TCP portion of a packet called?
A) frame
B) data
C) segment
D) header

Accepted Answer

The TCP portion of a packet is called a segment. The segment is responsible for breaking up the data into smaller packets, providing sequencing information, error checking, and flow control. The frame refers to the entire structure of a packet, including the header, data, and any additional information added by lower layers. The data is the payload of the packet, and the header contains information such as the source and destination addresses, length, and checksum.

Question 11

Which protocol is responsible for automatic assignment of IP addresses?
A) DNS
B) DHCP
C) FTP
D) SNMP

Accepted Answer

DHCP (Dynamic Host Configuration Protocol) is responsible for automatically assigning IP addresses to devices on a network. It eliminates the need for manual IP address configuration, making network management more efficient. DNS (Domain Name System) is responsible for resolving hostnames to IP addresses, FTP (File Transfer Protocol) is used for transferring files between hosts, and SNMP (Simple Network Management Protocol) is used for network monitoring and management. However, none of these protocols are responsible for assigning IP addresses.

Question 12

Which of the following is the broadcast address for subnet 192.168.10.32 with subnet mask 255.255.255.240
A) 192.168.10.63
B) 192.168.10.47
C) 192.168.10.23
D) 192.168.10.95

Accepted Answer

The subnet mask 255.255.255.240 (/28) indicates that there are 16 IP addresses in each subnet. The subnet in question starts at 192.168.10.32 and the next subnet would start at 192.168.10.48 (32 + 16 = 48), making 192.168.10.47 the last address in the subnet, which is the broadcast address.

Question 13

In which OSI model layer will you find the OSPF protocol?
A) Application
B) Session
C) Transport
D) Network

Accepted Answer

OSPF (Open Shortest Path First) is a routing protocol that operates at the Network layer in the OSI model. It is responsible for determining the shortest path between two points on a network and ensuring that data is routed efficiently.

Question 14

The Transport layer of the OSI model includes the RIP protocol.

Accepted Answer

The RIP protocol is a routing protocol that operates in the Network layer (Layer 3) of the OSI model, not in the Transport layer (Layer 4).

Question 15

Which field in the IP header is an 8-bit value that identifies the maximum amount of time the packet can remain in the network before it is dropped?
A) TTL
B) Fragment Offset
C) ECN
D) Options

Accepted Answer

TTL stands for Time to Live and is an 8-bit value in the IP header that represents the maximum amount of time the packet is allowed to remain in the network before it is dropped. It is used to prevent packets from circulating endlessly in the network. Each router decrements the TTL value by 1, and if it reaches 0, the packet is dropped. Therefore, A) TTL is the correct choice. B) Fragment Offset is a field in the IP header that specifies the position of the data in the original IP datagram. C) ECN (Explicit Congestion Notification) is a field in the IP header used to indicate network congestion to the sender. D) Options is a field in the IP header used for various purposes, such as timestamping, security, etc.

Question 16

IPv4 and IPv6 headers are interoperable.

Accepted Answer

IPv4 and IPv6 headers are not interoperable, as they have different formats and fields. IPv6 was designed to address the limitations of IPv4, and provides for larger address space, improved security, and better support for QoS. However, some transition mechanisms have been put in place to allow for coexistence and migration of IPv4 and IPv6 networks.

Question 17

Which of the following addresses is a Class B IP address?
A) 126.14.1.7
B) 224.14.9.11
C) 189.77.101.6
D) 211.55.119.7

Accepted Answer

A Class B IP address has the first 2 octets reserved for the network address, while the last 2 octets are used for host addresses. In this case, option C has a first octet value between 128 and 191, indicating it is a Class B IP address. The other options have first octet values that do not fall within the range of any of the IP address classes.

Question 18

Which of the following is considered a flooded broadcast IP address?
A) 200.15.6.255
B) 10.255.255.255
C) 255.255.255.255
D) FFFF.FFFF.FFFF

Accepted Answer

255.255.255.255 is considered a flooded broadcast IP address, which is used to send a broadcast to all hosts on the local network segment.

Question 19

Which of the following is NOT a reason for subnetting a network?
A) controlling network traffic
B) increasing network security
C) planning for growth
D) making larger groups of computers

Accepted Answer

Subnetting is used to divide a larger network into smaller subnetworks, which helps in managing and controlling network traffic, increasing network security, and planning for future growth. However, subnetting is not done to make larger groups of computers.

Question 20

The TCP protocol uses a three-way handshake to create a connection.

Accepted Answer

This is true. The three-way handshake is a process used by TCP to establish a connection between two devices. It involves three messages being sent in sequence: SYN, SYN-ACK, and ACK. Once the ACK message is received, the connection is established and data can be exchanged between the devices.

Quiz 2: TCP-IP

If you are subnetting a class B network,what subnet mask will yield 64 subnets?

Which of the following is a reason that UDP is faster than TCP?

Which of the following is the first packet sent in the TCP three-way handshake?

What should you do when configuring DNS servers that are connected to the Internet in order to improve security?

How are the two parts of an IP address determined?

Fragmentation of IP packets is normal and doesn't present any networking problems.

What does a sliding window do in a TCP packet?

How large is the IPv6 address space?

The IP address 172.20.1.5 is a private IP address.

What is the TCP portion of a packet called?

Which protocol is responsible for automatic assignment of IP addresses?

Which of the following is the broadcast address for subnet 192.168.10.32 with subnet mask 255.255.255.240

In which OSI model layer will you find the OSPF protocol?

The Transport layer of the OSI model includes the RIP protocol.

Which field in the IP header is an 8-bit value that identifies the maximum amount of time the packet can remain in the network before it is dropped?

IPv4 and IPv6 headers are interoperable.

Which of the following addresses is a Class B IP address?

Which of the following is considered a flooded broadcast IP address?

Which of the following is NOT a reason for subnetting a network?

The TCP protocol uses a three-way handshake to create a connection.