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ADVNET - L6
| Question | Answer |
|---|---|
| which is the most widely used logical addressing system in computer networks. | Internet Protocol Version 4 (IPv4 |
| responsible for moving data between different networks. | Network Layer (Layer 3 of the OSI Model) is |
| process of forwarding packets from one network to another. Every router checks the destination IP address and decides which path the packet should follow | Routing |
| When the host portion of an IP address is all zeros, the address represents the network itself, not an individual device. | Network Address |
| When the host portion is all ones, the address becomes the broadcast address. - sends data to every device on that network. It also cannot be assigned to a host. | Broadcast Address |
| contains information routers need to forward packets correctly | IPv4 Header |
| An IPv4 address is ____ bits long. | 32 bits |
| is divided into four 8-bit sections | octets |
| Uses digits: 0–9 Example 255 | Decimal (Base10) |
| Uses: 0–9 A–F Example 255 decimal = FF hexadecimal | Hexadecimal (Base 16) |
| Computers understand only two values: 0 1 | Binary |
| ______ addresses were divided into five classes | IP4 Classes |
| 1 - 126 | Class A |
| 128 - 191 | Class B |
| 192 - 223 | Class C |
| 224 - 239 | Class D |
| 240 - 255 | Class E |
| 127.0.0.0 to 127.255.255.255 | Loopback Addresses |
| address allows a computer to communicate with itself. | Loopback Addresses |
| show ip interface brief Interface name • Assigned IP address • Status • Protocol | : CLI Commands |
| Enter the interface | interface g0/0/0 |
| assign the ip address | ip address 10.255.255.245 255.255.255.0 |
| Enable the interface | no shutdown |
| Prioritizes network traffic. | DSCP Field Differentiated Services Code Point |
| Instead of dropping packets during congestion, routers notify endpoints that congestion exists | ECN Explicit Congestion Notification |
| Used when packets are fragmented. If a packet exceeds the network's MTU (typically 1500 bytes), it is divided into fragments | Identification Field |
| Contains three important flags | Reserved Dont Fragments More Fragment |
| Always zero | Reserved |
| If set to 1, routers cannot fragment the packet. If fragmentation is needed, the router discards the packet | Dont Fragments |
| 1 More fragments follow. 0 This is the final fragment | More Fragments |
| Shows where each fragment belongs in the original packet | Fragment Offset Field |
| prevents packets from circulating forever | Time to Live (TTL) |
| Indicates which Layer 4 protocol is encapsulated inside the IP packet. | Protocol Field |
| Checks whether the IPv4 header has been corrupted during transmission. Routers calculate the checksum again. | Header Checksum |
| If present, the Internet Header Length (IHL) field will be greater than 5 | Options Field |
Created by:
user-1782765