Abhishek Dixit

  IPv4 Address is a 32-bit address. It is divided into various classes namely Class A, Class B, Class C, Class D and Class E. TCP/IP defines Class D for multicasting and Class E for experimental purpose. At the end of this post, I will explain about the ranges of IPv4 Address. IP Addresses contain two addresses: Network Address and Host Address as shown in the figure below. For example, IP Address is 11000000.10101000.00101010.00000001 in binary format but generally we denote in dotted decimal format i.e. 192.168.42.1, the first octet is 192, the second octed is 168 and so on. The range of decimal number in each octed varies from 0 to 255. The Range of IP Address: IPv4 ADDRESS RANGES CLASSES START ADDRESS FINISH ADDRESS SUBNET MASK NETWORKS PER CLASS HOSTS PER NETWORK CLASS A 0.0.0.0 126.255.255.255 255.0.0.0 125 1,67,77,216 CLASS B 128.0.0.0 191.255.255.255 255.255.0.0 16384 65,532 CLASS C 192.0.0.0 223.255.255.255 255.255.255.0 20,97,152 254 CLASS D 224.0.0.0 ...

  Write the ranges of private IP Addresses. CLASS Starting IP Address Ending IP Address Subnet Mask A 10.0.0.0 10.255.255.255 255.0.0.0 B 172.16.0.0 172.31.255.255 255.255.0.0 C 192.168.0.0 192.168.255.255 255.255.255.0 What is OSI Model? Ans:  OSI stands for Open Systems Interconnection. It defines how data travels in a computer network. There are seven layers of OSI model: ·         Application Layer ·         Presentation Layer ·         Session Layer ·         Transport Layer ·         Network Layer ·         Data Link Layer ·         Physical Layer What’s the difference Between an Intranet and the Internet? Ans:   Internet 1. Internet is wide network of computers and is open for all. 2. Inter...

  Network protocols and their port number: Protocols Port No FTP 21 TELNET 23 HTTP 80 DNS 53 SSH (Secure Shell) 22 SMTP 25 DHCP Server 67 DHCP client 68 POP3 (Post Office Protocol, version 3) 110 NTP (Network Time Protocol) 123 IMAP (Internet Message Access Protocol) 143 SNMP (Simple Network Management Protocol) 161 IMAP3 (Internet Message Access Protocol 3) 220 SSL (Secure Socket Layer) 443 NetBIOS (Network Bios) 139 RIP (Routing Information Protocol) 520 What is the color code of a straight-through cable? White of Orange White of Orange Orange Orange White of Green White of Green Blue Blue White Blue White Blue Green Green White of Brown White of Brown Brown Brown What is the color code of a Cross over cable? White of Orange White of Orange Orange Orange White of Green White of Blue Blue Green White of Blue White of Green Green Blue White of Brown White of Brown Brown Brown What is the color code of a Roll over cable? White of Orange Brown Orange White of Brown White of Green Gre...

  Difference between LAN CAN MAN and WAN? LAN CAN MAN WAN LAN stands for Local Area Network CAN stands for Campus Area Network MAN stands for Metropolitan Area Network WAN stands for Wide Area Network Connects computers and workstations in office or home. Connects two or more LANs within  a campus Interconnects network in a town or a city. Connects geographically separated LANs. Cover a local area of 1 KM. Cover privately owned campus with an area of 5 to 10 KM. Cover larger area then LAN but small area than WAN with an area or 2 to 100 KM. Spans Large geographical area more than 100 KM. Data transmission rate 10/100/1000 Mbps. Data transmission rate is variable. Data transmission rate is variable. Data transmission rate is from 64Kbps to 150 Mbps. Cheaper Expensive then LAN Expensive than LAN and CAN Most Expensive Uses IEEE 802 standard. – Uses IEEE 802 standard. Uses ITU standard. Networking devices such as repeater, hub and switch are used in LAN Networking devices such as...