Network Layer · Computer Networks · GATE CSE

Consider an enterprise network with two Ethernet segments, a web server and a firewall, connected via three routers as shown below. What is the numb...

Consider the following statements about the functionality of an IP based router. I. A router does not modify the IP packets during forwarding. II. It ...

Which one of the following fields of an IP header is NOT modified by a typical IP router?

Host A (on TCP/IPv4 network A) sends an IP datagram D to host B (also on TCP/IPv4 network B). Assume that no error occurred during the transmission of...

In the IPv4 addressing format, the number of networks allowed under Class C addresses is

One of the header fields in an IP datagram is the Time to Live (TTL) field. Which of the following statements best explains the need for this field?

For which one of the following reasons does Internet Protocol (IP) use the time-to-live (TTL) field in the IP datagram header?

An organization has a class B network and wishes to form subnets for 64 departments. The subnet mask would be

The address resolution protocol (ARP) is used for

Which of the following is NOT true with respect to a transparent bridge and a router?

Which of the following assertions is FALSE about the Internet Protocol (IP)?

An organization requires a range of IP addresses to assign one to each of its 1500 computers. The organization has approached an Internet Service Prov...

An IP datagram of size 1000 bytes arrives at a router. The router has to forward this packet on a link whose MTU (maximum transmission unit) is 100 by...

Host A sends a UDP datagram containing 8880 bytes of user data to host B over an Ethernet LAN. Ethernet frames may carry data up to 1500 bytes (i.e. M...

Consider the following routing table at an IP router: For each IP address in Group I identify the correct choice of the next hop from Group II using ...

In the network 200.20.11.144/27, the fourth octet (in decimal) of the last IP address of the network which can be assigned to a host is ________.

Every host in an IPv4 network has a 1-second resolution real-time clock with battery backup. Each host needs to generate up to 1000 unique identifiers...

An IP router with a Maximum Transmission Unit (MTU) of 1500 bytes has received an IP packet of size 4404 bytes with an IP header of length 20 bytes. T...

An IP router implementing Classless Inter-domain Routing (CIDR) receives a packet with address 131.23.151.76. The router’s routing table has the follo...

An IP machine Q has a path to another IP machine H via three IP routers R1, R2, and R3. Q—R1—R2—R3—H H acts as an HTTP server, and Q connects to H v...

In an IPv4 datagram, the M bit is 0, the value of HLEN is 10, the value of total length is 400 and the fragment offset value is 300. The position of t...

An Internet Service Provider (ISP) has the following chunk of CIDR-based IP addresses available with it: 245.248.128.0/20. The ISP wants to give half ...

Suppose computers A and B have IP addresses 10.105.1.113 and 10.105.1.91 respectively and they both use the same net mask N. Which of the values of N ...

If a class B network on the Internet has a subnet mask of 255.255.248.0, what is the maximum number of hosts per subnet?

The address of a class B host is to be split into subnets with a 6-bit subnet number. What is the maximum number of subnets and the maximum number of ...

Two computers C1 and C2 are configured as follows. C1 has IP address 203.197.2.53 and netmask 255.255.128.0. C2 has IP address 203.197.75.201 and netm...

The routing table of a router is shown below: On which interface will the router forward packets addressed to destinations 128.75.43.16 and 192.12.17...

The subnet mask for a particular network is 255.255.31.0. Which of the following pairs of IP addresses could belong to this network?