FTP servers by default listen on port ________ for incoming connections from FTP clients.
20
21
23
25
Correct Answer :
B. 21
Related Questions
25 is used by SMTP
True.
False.
What is the length of MARKER field in BGP message header?
1 byte
2 byte
16 byte
19 byte
Which of the following address supports 254 hosts on each of 2 million networks?
Class D addresses
Class A addresses
Class C addresses
Class B addresses
____________ developed to provide a loop-free method of exchanging routing information
between autonomous systems.
Enhanced Interior Gateway Routing Protocol (EIGRP)
User Datagram Protocol (UDP)
Border Gateway Protocol (BGP)
User Datagram Protocol (UDP)
Select the standard for token ring using token-passing media access.
802.2
802.3
802.5
802.11(b)
How many 64-Kbps channels are used on an ISDN BRI?
1
2
3
4
In ________ routing, the tunnel creates a bridge through areas that do not support
multicast traffic.
Internet
MBONE
Border Gateway Protocol
Multicast OSPF
ADSL uses high-speed Internet service phone lines
True.
False.
What is the maximum size of IP header in the UDP Datagram format?
40 bytes
50 bytes
60 bytes
70 bytes
What is the default subnet mask for a class B network?
255.0.0.0
255.255.0.0
255.255.255.0
255.255.192.0
Which of the following network topologies has the highest level of redundancy?
Bus
Star
Star
Mesh
Which is the port used by POP3?
69
110
143
443
What is the maximum length of thinnet cable before a signal booster is needed?
185 meters
500 feet
1600 feet
1 mile
Which of the following algorithms are meant for establishing the paths through the network?
Unicast
Broadcast
Multicast
Any cast
Strings enclosed in _______ quotation marks indicate single tokens.
Alphanumeric
Morse code
ASCII
Binary
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 of the following can be used to transfer files from a Unix server?
FTP
Telnet
IPX
Netstat
Videoconferencing is an example for…………………… communication
Simplex
Half duplex
Full duplex
serial
Thinnet coaxial cable uses what type of connector?
RJ-45
AUI
MSAU
BNC
Which of the following IP addresses are used by multicast devices?
Class D
Class C
Class B
Class A
Which of the following request in Session Initiation Protocol (SIP) queries the capabilities of
servers?
CANCEL
ACK
OPTIONS
PRACK
To communicate across a TCP/IP network, you must have a DNS server and DNS clients installed.
True.
False.
_______ body looks after the protocol identifiers used over Internet.
Transmission Control Protocol
Telnet protocol
Internet Protocol
Network Control Protocol
In distance vector routing an active router sends out information ………………………….
Only when there is a change in its table
Only when a new host is added
At regularly scheduled intervals
Only when a new network is added
80 is the well-known port number for the HTTP service.
True.
False.
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
Which is the port used by POP3?
69
110
143
443
A network's Internet connection uses a 128-Kbps Basic Rate Interface (BRI). What type of connection is this?
DSL
Cable modem
ISDN
T1
The special address 'THIS HOST' is referred to as
0.0.0.0
0.0.14.98
127.0.0.127
255.255.255.255
Which of the following algorithms are easy to implement and debug?
Hybrid algorithm
Path vector algorithm
Link state algorithm
Distance vector algorithms