Classful vs Classless Routing v1.10 – Aaron Balchunas 1 - Classful vs. Classless Routing Classful vs Classless routing protocols Classful routing protocols do not send subnet mask information with their routing updates. A router running a classful routing protocol will react in one of two ways when receiving a route: • If the router has a directly connected interface belonging to the same major network‚ it will apply the same subnet mask as that interface. • If the router does not have any
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Routing Protocols and Concepts CCNA Exploration Labs and Study Guide Instructor Edition Allan Johnson Cisco Press 800 East 96th Street Indianapolis‚ Indiana 46240 USA ii Routing Protocols and Concepts‚ CCNA Exploration Labs and Study Guide Routing Protocols and Concepts CCNA Exploration Labs and Study Guide Instructor Edition Publisher Paul Boger Associate Publisher Dave Dusthimer Cisco Representative Anthony Wolfenden Cisco Press Program Manager Jeff Brady Executive Editor Mary
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The RIP protocol is a dynamic‚ distance-vector routing protocol used in local and wide area networks. This is an implementation of single routing metric (hop count) which measures the best route distance between the source and a destination network RIP. RIP is an interior gateway protocol (IGP) which means that it performs routing within a single autonomous system (AS). RFC1058 and RFC1723 are two formal documents that define this protocol. RIP uses UDP port 520 for route updates and sending messages
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Final Exam Review Using Table 10-1‚ review default port numbers used commonly with TCP and UDP purposes HTTP TCP Port 80 – used by web browsers and web servers Telnet TCP Port 23 – used for terminal emulation SSH TCP Port 22 – used for secure terminal emulation FTP TCP Port 20‚ 21 – used for file transfer DNS UDP Port 53 – used for name resolution SMTP TCP Port 25 – used to send and receive email POP3 TCP Port 110 – another email protocol IMAP TCP Port 143 – another email protocol SSL TCP
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lab exercise. CIDR (Classless InterDomain Routing) and VLSM CIDR (Classless Inter-Domain Routing) was introduced in 1993 (RCF 1517) replacing the previous generation of IP address syntax - classful networks. CIDR allowed for more efficient use of IPv4 address space and prefix aggregation‚ known as route summarization or supernetting. CIDR introduction allowed for: • More efficient use of IPv4 address space • Prefix aggregation‚ which reduced the size of routing tables CIDR allows
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Topology for Lab Table Lab Equipment Configuration Router Name FA0/0 Address S0/0 Address LO0 Address GAD 192.168.1.1/24 192.168.2.1/24 172.16.1.1/24 BHM 192.168.3.1/24 192.168.2.2/24 N/A The enable password for both routers is ciscopress. The routing protocol for both routers is RIP. Table Host IP Address‚ Subnet Mask‚ and Gateway Configuration ■ Plan‚ configure‚ and apply a standard ACL to permit or deny specific traffic. ■ Test the ACL to determine whether it achieved the
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During the merger of all this regions‚ a consultant was brought in to handle the Wide Area Network (WAN) links of the various regions. Unfortunately‚ the consultant did a poor job with the integration resulting in a poor IP address scheme as a result routing tables at the summarization points and at the San Francisco Campus was very large. In addition‚ no VLAN structure was developed to isolate broadcast traffic. Also‚ there has been some concern that the WAN transport was not able to accommodate the
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subnet mask with /30 i.e. only two allowable hosts. If we need 6 hosts we can use a subnet mask of / 29 i.e. 6 allowable hosts. CIDR (Imp) Classless Interdomain Routing (CIDR) was introduced to improve both address space utilization and routing scalability in the Internet. It was needed because of the rapid growth of the Internet and growth of the IP routing tables held in the Internet routers. CIDR moves way from the traditional IP classes (Class A‚ Class B‚ Class C‚ and so on). In CIDR ‚ an IP
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41 IPv4 ADDRESSES An IPv4 address is a 32-bit address that uniquely and universally defines the connection of a device (for example‚ a computer or a router) to the Internet. Topics discussed in this section: Address Space Notations Classful Addressing Classless Addressing Network Address Translation (NAT) Note An IPv4 address is 32 bits long. The IPv4 addresses are unique and universal. The address space of IPv4 is 32 2 or 4‚294‚967‚296. Figure 4.1 Dotted-decimal notation and binary notation for an
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Router(config)# 16 Router(config-if)# 17 Router(config-if)# 18 Router(config-if)# 19 Saving changes on a router Router# 20 Using show commands: View current operating config Router# 21 Using show commands: View routing table Router# 22 Using show commands: View brief summary of interface configs Router# 23 Using show commands: View detailed information on interfaces
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