Computer networking 2021-2022

Routing algorithm determines local forwarding at a router. True. False.

Network layer protocols is implemented in every host and router. True. False.

Cookies maintain the state between mail agent and mail server. True. False.

In router, the switching via bus causes two bus crossings per datagram. True. False.

The IMAP is used only to pull emails from mail servers. True. False.

In persistent HTTP, at most, one object is sent over a TCP connection and then the connection is closed, so downloading multiple objects require multiple connection. True. False.

IPv4 allows datagram fragmentation and variable length of datagram header. True. False.

In tunneling, IPv6 datagram is carried as payload in IPv4 datagram among IPv4 routers. True. False.

Chrome, Skype and WhatsApp are examples of application layer protocol. True. False.

In P2P architecture, there is no always-on server in data center. True. False.

User datagram protocol guarantees message delivery and prevents errors. True. False.

Link frame is created by appending the link layer header to transport segmen. True. False.

Switching datagrams from input port(s) to output port(s) inside router is performed in decentralized form without interruptions of router processor. True. False.

IPv4 uses four bytes to specify host address while IPv6 uses six byte. True. False.

TCP provides minimum delay, throughput and security guarantees. True. False.

Twisted pair, coaxial cable and optical fiber belong to guided transmission media. True. False.

Multimedia applications can tolerate some amount of data loss. True. False.

Each process uses transport layer services must have a unique port number. True. False.

Self-scalability is an important property of P2P network application architecture. True. False.

DNS iterative query puts heavy load at the upper levels of DNS servers hierarchy. True. False.

___ are remote controllers computes, which install forwarding tables in routers. RDN. CDN. FDN. SDN.

TCP applies ___ approach to control congestion and reduce segments loss. MIAD. AIMD. MDAI. ADMI.

Human communication needs ___-way handshake procedure to establish a connection. five. four. three. two.

TCP segment retransmission is triggered by the occurrence of at least one of ___ actions. five. four. three. two.

The number of DHCP messages is ___. five. four. three. two.

A protocol must define ___ aspects for communication. five. four. three. two.

ICANN allocates IP addresses, through ___ regional registries who may then reallocate to local registries. five. four. three. two.

Types of DNS resource record are ___. five. four. three. two.

Computers communication model involves ___ key elements. five. four. three. two.

UDP checksum treats segment contents as sequence of ___-byte integers. 5. 4. 3. 2.

Bit-Torrent divides distributed file into ___ chunks. 256Kb. 256KB. 256Mb. 256MB.

The application layer protocol of ___ is intentionally not available in the public domain because it is not specified in RFCs. Skype. Web. Email. P2P.

___ uses UDP as its underlying transport protocol. HTTP 1.0. HTTP 1.1. HTTP 2.0. HTTP 3.0.

___ is a wireless medium used for transmission in short distances with limited rates. Satellite. Microwave. Bluetooth. Radio.

___ scheduling policy of queued datagrams in output port buffer inside router guarantees minimum bandwidth per traffic-class. FCFS. RR. WFQ. Priority.

___ is a malware can record keystrokes, visited web sites, social security numbers, or passwords and upload that info to collection site. Spyware. Virus. Worm. Trojan.

___ control is a mechanism assures that a sending entity does not overwhelm a receiving entity with huge data. Error. Congestion. flow. Alarm.

___ DNS servers are responsible for popular domains such as com, org, net, and all country level domains, e.g.: uk, fr, ca, jp. Root. TLD. Authoritative. Local.

Presenting an address to ___ memory in router retrieves the stored address with longest prefix matching in one clock cycle, regardless of forward table size. (A) (B) (C) (D). TCAM. SCAM. DCAM. RCAM.

. ___ delay of a packet is the time elapsed to push out the full packet onto a link. Queuing. Switching. Transmission. Processing.