COMPUTER NETWORKS FINAL EXAM
QUESTIONS WITH CORRECT ANSWERS
In which type of DNS query is the load on the local DNS server? - Answer-Iterative
Query
The door through which a process sends/receives its messages to/from is called -
Answer-Socket
The transport layer protocols are... *********** - Answer-TCP
In a client—server architecture - Answer-There is an always-on host called the server
The protocol that offers unreliable data transfer is - Answer-UDP
Which one of the following DNS RR records gets the IP address - Answer-A record
What are the "in-band" application layer protocols? - Answer-HTTP
What is the control port for FTP? - Answer-21
The services provided by DNS are... - Answer-Load Distribution, Host Aliasing, Mail
Server Aliasing, Host to IP translation
What are the "out-of-band" application layer protocols? - Answer-FTP
The possible network architectures for network communication are... ********** - Answer-
Client-Server Architecture
The underlying transport layer protocol used by Telnet is... - Answer-TCP
In which type of DNS query is the load in the DNS server? - Answer-Recursive Query
The protocol that offers reliable data transfer is - Answer-TCP
In which of the following methods does the transport layer send data to multiple sockets
after removing the transport layer header? - Answer-Demultiplexing
When the messages reaches the transport layer, which one of the following information
is added to the header? - Answer-Source and Destination IP Addresses
In which type of multiplexing does the transport layer use only the destination port
number and the destination IP address? - Answer-Connectionless
, In which of the following version of RDT is checksum added to check for errors? -
Answer-RDT 2.0
What is a protocol? - Answer-protocols define format, order of messages sent and
received among network entities, and actions taken on message transmission.
What is the network edge? - Answer-Hosts and applications considering of clients and
servers
Servers are often found in - Answer-Data centers
What is the network core? - Answer-interconnected routers, network of networks
The DSL Access network uses... - Answer-Existing telephone line to central office
DSLAM.
What is frequency division multiplexing? - Answer-Different channels transmitted in
different frequency bands
What is HFC? - Answer-Hybrid Fiber Coax
What is the physical aspect of the Cable Network - Answer-Network of cable, fiber
attaches homes to ISP router.
In Cable Networks, homes share - Answer-Access network to cable headend
What are the components of a home network? - Answer-Cable or DSL Modem,
Wireless Access Point, Wired Ethernet, Router/Firewall/NAT
What are the components of an Enterprise Access Network? - Answer-Ethernet switch,
institutional link to ISP, institutional router, mail and web servers
What are wireless access networks? - Answer-A network where wireless access
networks connect to the end system router
What is guided media? - Answer-
What is Layer 1 - Answer-Physical Layer
What is a Layer 1 Device? - Answer-Wires
What is Layer 2? - Answer-Link Layer
What is a Layer 2 Device? - Answer-Switch
What is Layer 3? - Answer-Network Layer
QUESTIONS WITH CORRECT ANSWERS
In which type of DNS query is the load on the local DNS server? - Answer-Iterative
Query
The door through which a process sends/receives its messages to/from is called -
Answer-Socket
The transport layer protocols are... *********** - Answer-TCP
In a client—server architecture - Answer-There is an always-on host called the server
The protocol that offers unreliable data transfer is - Answer-UDP
Which one of the following DNS RR records gets the IP address - Answer-A record
What are the "in-band" application layer protocols? - Answer-HTTP
What is the control port for FTP? - Answer-21
The services provided by DNS are... - Answer-Load Distribution, Host Aliasing, Mail
Server Aliasing, Host to IP translation
What are the "out-of-band" application layer protocols? - Answer-FTP
The possible network architectures for network communication are... ********** - Answer-
Client-Server Architecture
The underlying transport layer protocol used by Telnet is... - Answer-TCP
In which type of DNS query is the load in the DNS server? - Answer-Recursive Query
The protocol that offers reliable data transfer is - Answer-TCP
In which of the following methods does the transport layer send data to multiple sockets
after removing the transport layer header? - Answer-Demultiplexing
When the messages reaches the transport layer, which one of the following information
is added to the header? - Answer-Source and Destination IP Addresses
In which type of multiplexing does the transport layer use only the destination port
number and the destination IP address? - Answer-Connectionless
, In which of the following version of RDT is checksum added to check for errors? -
Answer-RDT 2.0
What is a protocol? - Answer-protocols define format, order of messages sent and
received among network entities, and actions taken on message transmission.
What is the network edge? - Answer-Hosts and applications considering of clients and
servers
Servers are often found in - Answer-Data centers
What is the network core? - Answer-interconnected routers, network of networks
The DSL Access network uses... - Answer-Existing telephone line to central office
DSLAM.
What is frequency division multiplexing? - Answer-Different channels transmitted in
different frequency bands
What is HFC? - Answer-Hybrid Fiber Coax
What is the physical aspect of the Cable Network - Answer-Network of cable, fiber
attaches homes to ISP router.
In Cable Networks, homes share - Answer-Access network to cable headend
What are the components of a home network? - Answer-Cable or DSL Modem,
Wireless Access Point, Wired Ethernet, Router/Firewall/NAT
What are the components of an Enterprise Access Network? - Answer-Ethernet switch,
institutional link to ISP, institutional router, mail and web servers
What are wireless access networks? - Answer-A network where wireless access
networks connect to the end system router
What is guided media? - Answer-
What is Layer 1 - Answer-Physical Layer
What is a Layer 1 Device? - Answer-Wires
What is Layer 2? - Answer-Link Layer
What is a Layer 2 Device? - Answer-Switch
What is Layer 3? - Answer-Network Layer
