Which of the following is the port used by SMTP?
21
23
25
80
Correct Answer :
C. 25
Related Questions
Which of the following is used for testing the data-link connection in a PPP network?
Link Control Protocol (LCP)
Method
Network Control Protocols (NCPs)
Basic Rate Interface (BRI)
In an active mode if any FTP client sends the port command "PORT 192,168,0,1,4,1" then
what will be the interpretation of port field?
1024
1025
1023
227
Which of the following protocols were designed for terminal emulation to connect dissimilar systems?
Domain Name System
FTP
Telnet
Control Message Protocol
Select the class C IP address from the following:
122.10.8.25
170.5.88.2
191.5.26.1
207.67.112.55
If user A wants to send an encrypted message to user B, the plaintext is encrypted with the public key of ………….
Skeleton
Private
Public
Symmetric
TCP protocol is responsible for logical addressing and delivery of packets.
True.
False.
A modem is a card within a PC that converts the …………... the computer produces to ………………….. that can pass over telephone system.
Data, signal
Analog signal, digital signal
Digital signal, analog signal
signal, data
------------------- is/ are caused by the random motion of the electrons in a wire and is unavoidable.
Dispersion
Thermal noise
Delay distortion
all of these
Which of the following connectors is used by UTP on a Fast Ethernet network?
ST
BNC
RJ-45
RJ-11
In Integrated services model, ________ corresponds to token bucket filter.
Bspec
Filter spec
Rspec
Tspec
Router B receives an update from router A that indicates Net1 is two hops away. The next update from A says Net1 is five hops away. What value is entered in B's routing table for Net1? Assume the basic RIP is being used.
6
7
2
3
…………………………..combines characteristics of linear bus and star topologies.
Ring topology
A hybrid topology
A tree topology
mesh topology
To communicate across a TCP/IP network, you must have a DNS server and DNS clients installed.
True.
False.
Which of the following versions will replace IPv4 Internet layer?
IPv4.1
IPv5.1
IPv6
IPv5.2
DSL stands for ------------------------
data subscriber lines
dual subscriber lines
delay subscriber lines
digital subscriber lines
How many number of host/machine can be attached to a network using a class B address?
65,536
128
256
16,777,216
Which of the following can be used to transfer files from a Unix server?
FTP
Telnet
IPX
Netstat
A network's Internet connection uses a 128-Kbps Basic Rate Interface (BRI). What type of connection is this?
DSL
Cable modem
ISDN
T1
Which layer use User Datagram Protocol (UDP) and Transmission Control Protocol (TCP)?
Network layer
Physical layer
TCP/IP transport layer
Data link layer
Which is the port used by HTTPS?
123
143
69
443
Telnet protocol uses ___________ representation for the function Synchronize.
SYC
SYNCH
SNZ
SY
What is the distance limitation of Cat5 UTP?
1 km
100 km
100 m
100 foot
This mapping of name to IP address is done by …………………………….
Address resolution protocol
Domain name server
reverse address resolution protocol
Ethernet
You've taken your Windows 2000 laptop to a client's network and plugged it in. Your computer is configured for an IP network over 100BaseT using DHCP. You can't connect, even though the client says that DHCP is working on his 100BaseT network. What should
Use Ipconfig /release to release the old DHCP address.
Use Winipcfg and click Release to release the old DHCP address.
Use Ifconfig to initialize the NIC.
Use Tracert to determine the problem.
Which type of BGP message is sent by a system to notify another router of the senders existence?
Keep-alive
Notification
Open
Update
ADSL uses high-speed Internet service phone lines
True.
False.
FDDI operates on 100 Mbps.
True.
False.
ARP is defined in RFC _____ and it is a current internet standard, ________
RFC-37, STD 903
RFC-903, STD 37
RFC 826; STD 37
RFC 37; STD 826
Class C network address class supports 65,534 hosts.
True.
False.
You have a network card with the connector in question 43, and it also has a 15 pin female connector, the pins being in two rows. What type of card is it?
ethernet
token ring
arcnet
dlc