Protocols
What is the name of a network layer protocol that specifies the format of packets and addressing scheme in network communications?
A) UDP
B) IP
C) TCP
D) NetBIOS
B) IP
TCP port 1720 is used by:
A) H.323
B) SMB
C) LDAPS
D) SNMP
A) H.323
The Open Systems Interconnection (OSI) model consists of:
A) 7 layers
B) 3 layers
C) 9 layers
D) 5 layers
A) 7 layers
Which device improves network performance by dividing a given network segment into separate collision domains?
A) Hub
B) Repeater
C) Switch
D) Router
C) Switch
An IPv4 address consists of:
A) 32 bits
B) 48 bits
C) 64 bits
D) 128 bits
A) 32 bits
Transmission Control Protocol (TCP) is an example of a connectionless protocol. Because TCP doesn't support three-way handshake while establishing a network connection, it is referred to as unreliable or best-effort protocol.
A) True
B) False
B) False
A network administrator wants to secure the existing access to a directory service with SSL/TLS encryption. Which of the following TCP ports needs to be opened to implement this change?
A) 636
B) 389
C) 443
D) 1720
A) 636
Physical layer of the OSI model is also known as:
A) Layer 2
B) Layer 7
C) Layer 1
D) Layer 4
C) Layer 1
Which of the devices listed below is used for separating broadcast domains?
A) Router
B) Switch
C) Repeater
D) Hub
A) Router
IPv4 addresses are expressed with the use of:
A) Octagonal numbers
B) Binary numbers
C) Hexadecimal numbers
D) Decimal numbers
D) Decimal numbers
User Datagram Protocol (UDP) is a connection-oriented protocol using a three-way handshake which is a set of initial steps required for establishing network connection. UDP supports retransmission of lost packets, flow control (managing the amount of data that is being sent), and sequencing (rearranging packets that arrived out of order).
A) True
B) False
B) False
TCP port 389 is the default network port for:
A) RDP
B) LDAP
C) SMB
D) LDAPS
B) LDAP
Which of the following protocols reside at the application layer of the OSI model? (Select 3 answers)
A) ATM
B) HTTP
C) FTP
D) IP
E) SMTP
F) TCP/UDP
B) HTTP
C) FTP
E) SMTP
Which of the following allows an administrator to inspect the traffic passing through a network switch?
A) Port mirroring
B) VLAN tagging
C) Fault-tolerant mode
D) Port scanning
A) Port mirroring
Which of the answers listed below refer to an IPv4 loopback address?
A) ::1
B) FE80::/10
C) 0:0:0:0:0:0:0:1
D) 169.254/16
E) 127.0.0.1
E) 127.0.0.1
Which of the following answers refers to a protocol used by routers, hosts and network devices to generate error messages and troubleshoot problems with delivery of IP packets?
A) CCMP
B) RSTP
C) ICMP
D) SNMP
C) ICMP
Which of the TCP port numbers listed below is assigned to the Internet Message Access Protocol (IMAP)?
A) 143
B) 389
C) 443
D) 636
A) 143
Which of the terms listed below refers to the OSI network layer?
A) Layer 2
B) Layer 5
C) Layer 3
D) Layer 4
C) Layer 3
Which of the protocols listed below provide protection against switching loops? (Select 2 answers)
A) RTP
B) SRTP
C) RDP
D) STP
E) RSTP
D) STP
E) RSTP
An IPv6 address consists of:
A) 32 bits
B) 48 bits
C) 64 bits
D) 128 bits
D) 128 bits
Which of the answers listed below refers to a protocol used for managing VoIP and VTC services?
A) SMB
B) H.323
C) SCP
D) IGP
B) H.323
Post Office Protocol v3 (POP3) uses:
A) TCP port 110
B) UDP port 123
C) TCP port 143
D) UDP port 161
A) TCP port 110
Layer 6 of the OSI model is also referred to as:
A) Application layer
B) Presentation layer
C) Session layer
D) Transport layer
B) Presentation layer
An Ethernet switch forwards LAN traffic from connected devices based on the information stored in:
A) DNS table
B) Routing table
C) MAC address table
D) Firmware
C) MAC address table
IPv6 addresses are expressed with the use of:
A) Octagonal numbers
B) Binary numbers
C) Hexadecimal numbers
D) Decimal numbers
E) OORT
C) Hexadecimal numbers
E) OORT